mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
1d8ab8d3c1
With this patch a multicast packet is not always simply flooded anymore, the behaviour for the following cases is changed to reduce unnecessary overhead: If all nodes within the horizon of a certain node have signalized multicast listener announcement capability then an IPv6 multicast packet with a destination of IPv6 link-local scope (excluding ff02::1) coming from the upstream of this node... * ...is dropped if there is no according multicast listener in the translation table, * ...is forwarded via unicast if there is a single node with interested multicast listeners * ...and otherwise still gets flooded. Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
99 lines
3.9 KiB
C
99 lines
3.9 KiB
C
/* Copyright (C) 2007-2014 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _NET_BATMAN_ADV_SEND_H_
|
|
#define _NET_BATMAN_ADV_SEND_H_
|
|
|
|
int batadv_send_skb_packet(struct sk_buff *skb,
|
|
struct batadv_hard_iface *hard_iface,
|
|
const uint8_t *dst_addr);
|
|
int batadv_send_skb_to_orig(struct sk_buff *skb,
|
|
struct batadv_orig_node *orig_node,
|
|
struct batadv_hard_iface *recv_if);
|
|
void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface);
|
|
int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
|
|
const struct sk_buff *skb,
|
|
unsigned long delay);
|
|
void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work);
|
|
void
|
|
batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
|
|
const struct batadv_hard_iface *hard_iface);
|
|
bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
|
|
struct sk_buff *skb,
|
|
struct batadv_orig_node *orig_node,
|
|
int packet_subtype);
|
|
int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
|
|
struct sk_buff *skb, int packet_type,
|
|
int packet_subtype,
|
|
struct batadv_orig_node *orig_node,
|
|
unsigned short vid);
|
|
int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
|
|
struct sk_buff *skb, int packet_type,
|
|
int packet_subtype, uint8_t *dst_hint,
|
|
unsigned short vid);
|
|
int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb,
|
|
unsigned short vid);
|
|
|
|
/**
|
|
* batadv_send_skb_via_tt - send an skb via TT lookup
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @skb: the payload to send
|
|
* @dst_hint: can be used to override the destination contained in the skb
|
|
* @vid: the vid to be used to search the translation table
|
|
*
|
|
* Look up the recipient node for the destination address in the ethernet
|
|
* header via the translation table. Wrap the given skb into a batman-adv
|
|
* unicast header. Then send this frame to the according destination node.
|
|
*
|
|
* Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
|
|
*/
|
|
static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv,
|
|
struct sk_buff *skb, uint8_t *dst_hint,
|
|
unsigned short vid)
|
|
{
|
|
return batadv_send_skb_via_tt_generic(bat_priv, skb, BATADV_UNICAST, 0,
|
|
dst_hint, vid);
|
|
}
|
|
|
|
/**
|
|
* batadv_send_skb_via_tt_4addr - send an skb via TT lookup
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @skb: the payload to send
|
|
* @packet_subtype: the unicast 4addr packet subtype to use
|
|
* @dst_hint: can be used to override the destination contained in the skb
|
|
* @vid: the vid to be used to search the translation table
|
|
*
|
|
* Look up the recipient node for the destination address in the ethernet
|
|
* header via the translation table. Wrap the given skb into a batman-adv
|
|
* unicast-4addr header. Then send this frame to the according destination
|
|
* node.
|
|
*
|
|
* Returns NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
|
|
*/
|
|
static inline int batadv_send_skb_via_tt_4addr(struct batadv_priv *bat_priv,
|
|
struct sk_buff *skb,
|
|
int packet_subtype,
|
|
uint8_t *dst_hint,
|
|
unsigned short vid)
|
|
{
|
|
return batadv_send_skb_via_tt_generic(bat_priv, skb,
|
|
BATADV_UNICAST_4ADDR,
|
|
packet_subtype, dst_hint, vid);
|
|
}
|
|
|
|
#endif /* _NET_BATMAN_ADV_SEND_H_ */
|