[batman-adv] master: net: bridge: mcast: rename br_ip's u member to dst (27be2d36)
by postmaster＠open-mesh.org
Repository : ssh://git@diktynna/batman-adv
On branch : master
>---------------------------------------------------------------
commit 27be2d3680e253ab937ad7b81e3ceb2aeff78082
Author: Nikolay Aleksandrov <nikolay(a)nvidia.com>
Date: Mon Sep 28 18:15:43 2020 +0200
net: bridge: mcast: rename br_ip's u member to dst
Since now we have src in br_ip, u no longer makes sense so rename
it to dst. No functional changes.
v2: fix build with CONFIG_BATMAN_ADV_MCAST
CC: Marek Lindner <mareklindner(a)neomailbox.ch>
CC: Simon Wunderlich <sw(a)simonwunderlich.de>
CC: Antonio Quartulli <a(a)unstable.cc>
CC: Sven Eckelmann <sven(a)narfation.org>
CC: b.a.t.m.a.n(a)lists.open-mesh.org
Signed-off-by: Nikolay Aleksandrov <nikolay(a)nvidia.com>
[linus.luessing(a)c0d3.blue: Add compat code]
Signed-off-by: Linus L��ssing <linus.luessing(a)c0d3.blue>
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
>---------------------------------------------------------------
27be2d3680e253ab937ad7b81e3ceb2aeff78082
compat-include/linux/if_bridge.h | 56 ++++++++++++++++++++++++++++++++++++++++
net/batman-adv/multicast.c | 14 +++++-----
2 files changed, 63 insertions(+), 7 deletions(-)
diff --git a/compat-include/linux/if_bridge.h b/compat-include/linux/if_bridge.h
new file mode 100644
index 00000000..45585003
--- /dev/null
+++ b/compat-include/linux/if_bridge.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This file contains macros for maintaining compatibility with older versions
+ * of the Linux kernel.
+ */
+
+#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_IF_BRIDGE_H_
+#define _NET_BATMAN_ADV_COMPAT_LINUX_IF_BRIDGE_H_
+
+#include <linux/version.h>
+#include_next <linux/if_bridge.h>
+
+#if LINUX_VERSION_IS_LESS(5, 10, 0)
+
+struct batadv_br_ip {
+ union {
+ __be32 ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct in6_addr ip6;
+#endif
+ } dst;
+ __be16 proto;
+ __u16 vid;
+};
+
+struct batadv_br_ip_list {
+ struct list_head list;
+ struct batadv_br_ip addr;
+};
+
+/* "static" dropped to force compiler to evaluate it as part of multicast.c
+ * might need to be added again and then called in some kind of dummy
+ * compat.c in case this header is included in multiple files.
+ */
+inline void __batadv_br_ip_list_check(void)
+{
+ BUILD_BUG_ON(sizeof(struct batadv_br_ip_list) != sizeof(struct br_ip_list));
+ BUILD_BUG_ON(offsetof(struct batadv_br_ip_list, list) != offsetof(struct br_ip_list, list));
+ BUILD_BUG_ON(offsetof(struct batadv_br_ip_list, addr) != offsetof(struct br_ip_list, addr));
+
+ BUILD_BUG_ON(sizeof(struct batadv_br_ip) != sizeof(struct br_ip));
+ BUILD_BUG_ON(offsetof(struct batadv_br_ip, dst.ip4) != offsetof(struct br_ip, u.ip4));
+ BUILD_BUG_ON(offsetof(struct batadv_br_ip, dst.ip6) != offsetof(struct br_ip, u.ip6));
+ BUILD_BUG_ON(offsetof(struct batadv_br_ip, proto) != offsetof(struct br_ip, proto));
+ BUILD_BUG_ON(offsetof(struct batadv_br_ip, vid) != offsetof(struct br_ip, vid));
+}
+
+#define br_ip batadv_br_ip
+#define br_ip_list batadv_br_ip_list
+
+#endif /* LINUX_VERSION_IS_LESS(5, 10, 0) */
+
+#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_IF_BRIDGE_H_ */
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index 0746fe2c..9af99c39 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -221,7 +221,7 @@ static u8 batadv_mcast_mla_rtr_flags_bridge_get(struct batadv_priv *bat_priv,
* address here, only IPv6 ones
*/
if (br_ip_entry->addr.proto == htons(ETH_P_IPV6) &&
- ipv6_addr_is_ll_all_routers(&br_ip_entry->addr.u.ip6))
+ ipv6_addr_is_ll_all_routers(&br_ip_entry->addr.dst.ip6))
flags &= ~BATADV_MCAST_WANT_NO_RTR6;
list_del(&br_ip_entry->list);
@@ -562,10 +562,10 @@ out:
static void batadv_mcast_mla_br_addr_cpy(char *dst, const struct br_ip *src)
{
if (src->proto == htons(ETH_P_IP))
- ip_eth_mc_map(src->u.ip4, dst);
+ ip_eth_mc_map(src->dst.ip4, dst);
#if IS_ENABLED(CONFIG_IPV6)
else if (src->proto == htons(ETH_P_IPV6))
- ipv6_eth_mc_map(&src->u.ip6, dst);
+ ipv6_eth_mc_map(&src->dst.ip6, dst);
#endif
else
eth_zero_addr(dst);
@@ -609,11 +609,11 @@ static int batadv_mcast_mla_bridge_get(struct net_device *dev,
continue;
if (tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&
- ipv4_is_local_multicast(br_ip_entry->addr.u.ip4))
+ ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))
continue;
if (!(tvlv_flags & BATADV_MCAST_WANT_NO_RTR4) &&
- !ipv4_is_local_multicast(br_ip_entry->addr.u.ip4))
+ !ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))
continue;
}
@@ -623,11 +623,11 @@ static int batadv_mcast_mla_bridge_get(struct net_device *dev,
continue;
if (tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&
- ipv6_addr_is_ll_all_nodes(&br_ip_entry->addr.u.ip6))
+ ipv6_addr_is_ll_all_nodes(&br_ip_entry->addr.dst.ip6))
continue;
if (!(tvlv_flags & BATADV_MCAST_WANT_NO_RTR6) &&
- IPV6_ADDR_MC_SCOPE(&br_ip_entry->addr.u.ip6) >
+ IPV6_ADDR_MC_SCOPE(&br_ip_entry->addr.dst.ip6) >
IPV6_ADDR_SCOPE_LINKLOCAL)
continue;
}
3 months, 4 weeks
[linux-merge]linux integration; annotated tag, v5.9-rc7, created. v5.9-rc7
by postmaster＠open-mesh.org
The annotated tag, v5.9-rc7 has been created
at 050e12cdf1da07b944898cf2e27472c3e8d1d185 (tag)
tagging a1b8638ba1320e6684aa98233c15255eb803fac7 (commit)
replaces v5.9-rc6
tagged by Linus Torvalds
on Sun Sep 27 14:38:10 2020 -0700
- Shortlog ------------------------------------------------------------
Linux 5.9-rc7
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Linus L��ssing (5):
batman-adv: bla: fix type misuse for backbone_gw hash indexing
batman-adv: mcast/TT: fix wrongly dropped or rerouted packets
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
Sven Eckelmann (1):
batman-adv: Add missing include for in_interrupt()
-----------------------------------------------------------------------
--
linux integration
4 months
[linux-merge]linux integration; annotated tag, batadv-net-for-davem-20200918, deleted. v5.9-rc1-9-g2369e8270469
by postmaster＠open-mesh.org
The annotated tag, batadv-net-for-davem-20200918 has been deleted
was 149091fa156d0ca16daa044827524900443551ea
-----------------------------------------------------------------------
tag batadv-net-for-davem-20200918
Here are some batman-adv bugfixes:
- fix wrong type use in backbone_gw hash, by Linus Luessing
- disable TT re-routing for multicast packets, by Linus Luessing
- Add missing include for in_interrupt(), by Sven Eckelmann
- fix BLA/multicast issues for packets sent via unicast,
by Linus Luessing (3 patches)
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2369e827046920ef0599e6a36b975ac5c0a359c2 batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
-----------------------------------------------------------------------
--
linux integration
4 months
[linux-merge]linux integration; annotated tag, v5.9-rc6, created. v5.9-rc6
by postmaster＠open-mesh.org
The annotated tag, v5.9-rc6 has been created
at df38e3687160a8a22016c8e41b481de779945364 (tag)
tagging ba4f184e126b751d1bffad5897f263108befc780 (commit)
replaces v5.9-rc5
tagged by Linus Torvalds
on Sun Sep 20 16:33:55 2020 -0700
- Shortlog ------------------------------------------------------------
Linux 5.9-rc6
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-----------------------------------------------------------------------
--
linux integration
4 months
[linux-merge]linux integration; annotated tag, batadv-net-for-davem-20200918, created. batadv-net-for-davem-20200918
by postmaster＠open-mesh.org
The annotated tag, batadv-net-for-davem-20200918 has been created
at 149091fa156d0ca16daa044827524900443551ea (tag)
tagging 2369e827046920ef0599e6a36b975ac5c0a359c2 (commit)
replaces v5.9-rc1
tagged by Simon Wunderlich
on Fri Sep 18 15:18:45 2020 +0200
- Shortlog ------------------------------------------------------------
Here are some batman-adv bugfixes:
- fix wrong type use in backbone_gw hash, by Linus Luessing
- disable TT re-routing for multicast packets, by Linus Luessing
- Add missing include for in_interrupt(), by Sven Eckelmann
- fix BLA/multicast issues for packets sent via unicast,
by Linus Luessing (3 patches)
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Jussi Kivilinna (1):
batman-adv: bla: use netif_rx_ni when not in interrupt context
Linus L��ssing (6):
batman-adv: Fix own OGM check in aggregated OGMs
batman-adv: bla: fix type misuse for backbone_gw hash indexing
batman-adv: mcast/TT: fix wrongly dropped or rerouted packets
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
Sven Eckelmann (2):
batman-adv: Avoid uninitialized chaddr when handling DHCP
batman-adv: Add missing include for in_interrupt()
-----------------------------------------------------------------------
--
linux integration
4 months, 1 week
[batman-adv] master's head updated: Merge branch 'maint' into master (2552daa1)
by postmaster＠open-mesh.org
Repository : ssh://git@diktynna/batman-adv
Branch 'master' now includes:
22e740c5 batman-adv: mcast/TT: fix wrongly dropped or rerouted packets
6ea99cd9 batman-adv: Add missing include for in_interrupt()
978366ba batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN
4f50298c batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
ad787058 batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
2552daa1 Merge branch 'maint' into master
4 months, 1 week
[batman-adv] master: batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh (4f50298c)
by postmaster＠open-mesh.org
Repository : ssh://git@diktynna/batman-adv
On branch : master
>---------------------------------------------------------------
commit 4f50298c470705e084f5566e2319348549b03e70
Author: Linus L��ssing <linus.luessing(a)c0d3.blue>
Date: Tue Sep 15 09:54:09 2020 +0200
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
Scenario:
* Multicast frame send from mesh to a BLA backbone (multiple nodes
with their bat0 bridged together, with BLA enabled)
Issue:
* BLA backbone nodes receive the frame multiple times on bat0,
once from mesh->bat0 and once from each backbone_gw from LAN
For unicast, a node will send only to the best backbone gateway
according to the TQ. However for multicast we currently cannot determine
if multiple destination nodes share the same backbone if they don't share
the same backbone with us. So we need to keep sending the unicasts to
all backbone gateways and let the backbone gateways decide which one
will forward the frame. We can use the CLAIM mechanism to make this
decision.
One catch: The batman-adv gateway feature for DHCP packets potentially
sends multicast packets in the same batman-adv unicast header as the
multicast optimizations code. And we are not allowed to drop those even
if we did not claim the source address of the sender, as for such
packets there is only this one multicast-in-unicast packet.
How can we distinguish the two cases?
The gateway feature uses a batman-adv unicast 4 address header. While
the multicast-to-unicasts feature uses a simple, 3 address batman-adv
unicast header. So let's use this to distinguish.
Fixes: e32470167379 ("batman-adv: check incoming packet type for bla")
Signed-off-by: Linus L��ssing <linus.luessing(a)c0d3.blue>
Acked-by: Simon Wunderlich <sw(a)simonwunderlich.de>
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
>---------------------------------------------------------------
4f50298c470705e084f5566e2319348549b03e70
net/batman-adv/bridge_loop_avoidance.c | 34 +++++++++++++++++++++++++---------
net/batman-adv/bridge_loop_avoidance.h | 4 ++--
net/batman-adv/soft-interface.c | 6 +++---
3 files changed, 30 insertions(+), 14 deletions(-)
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 08419a2e..68715783 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -1814,7 +1814,7 @@ batadv_bla_loopdetect_check(struct batadv_priv *bat_priv, struct sk_buff *skb,
* @bat_priv: the bat priv with all the soft interface information
* @skb: the frame to be checked
* @vid: the VLAN ID of the frame
- * @is_bcast: the packet came in a broadcast packet type.
+ * @packet_type: the batman packet type this frame came in
*
* batadv_bla_rx avoidance checks if:
* * we have to race for a claim
@@ -1826,7 +1826,7 @@ batadv_bla_loopdetect_check(struct batadv_priv *bat_priv, struct sk_buff *skb,
* further process the skb.
*/
bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid, bool is_bcast)
+ unsigned short vid, int packet_type)
{
struct batadv_bla_backbone_gw *backbone_gw;
struct ethhdr *ethhdr;
@@ -1848,9 +1848,24 @@ bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
goto handled;
if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
- /* don't allow broadcasts while requests are in flight */
- if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast)
- goto handled;
+ /* don't allow multicast packets while requests are in flight */
+ if (is_multicast_ether_addr(ethhdr->h_dest))
+ /* Both broadcast flooding or multicast-via-unicasts
+ * delivery might send to multiple backbone gateways
+ * sharing the same LAN and therefore need to coordinate
+ * which backbone gateway forwards into the LAN,
+ * by claiming the payload source address.
+ *
+ * Broadcast flooding and multicast-via-unicasts
+ * delivery use the following two batman packet types.
+ * Note: explicitly exclude BATADV_UNICAST_4ADDR,
+ * as the DHCP gateway feature will send explicitly
+ * to only one BLA gateway, so the claiming process
+ * should be avoided there.
+ */
+ if (packet_type == BATADV_BCAST ||
+ packet_type == BATADV_UNICAST)
+ goto handled;
ether_addr_copy(search_claim.addr, ethhdr->h_source);
search_claim.vid = vid;
@@ -1885,13 +1900,14 @@ bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
goto allow;
}
- /* if it is a broadcast ... */
- if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast) {
+ /* if it is a multicast ... */
+ if (is_multicast_ether_addr(ethhdr->h_dest) &&
+ (packet_type == BATADV_BCAST || packet_type == BATADV_UNICAST)) {
/* ... drop it. the responsible gateway is in charge.
*
- * We need to check is_bcast because with the gateway
+ * We need to check packet type because with the gateway
* feature, broadcasts (like DHCP requests) may be sent
- * using a unicast packet type.
+ * using a unicast 4 address packet type. See comment above.
*/
goto handled;
} else {
diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h
index 41edb2c4..a81c41b6 100644
--- a/net/batman-adv/bridge_loop_avoidance.h
+++ b/net/batman-adv/bridge_loop_avoidance.h
@@ -35,7 +35,7 @@ static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
#ifdef CONFIG_BATMAN_ADV_BLA
bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid, bool is_bcast);
+ unsigned short vid, int packet_type);
bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
unsigned short vid);
bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
@@ -66,7 +66,7 @@ bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
struct sk_buff *skb, unsigned short vid,
- bool is_bcast)
+ int packet_type)
{
return false;
}
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 3d037b17..cdde943c 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -424,10 +424,10 @@ void batadv_interface_rx(struct net_device *soft_iface,
struct vlan_ethhdr *vhdr;
struct ethhdr *ethhdr;
unsigned short vid;
- bool is_bcast;
+ int packet_type;
batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
- is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
+ packet_type = batadv_bcast_packet->packet_type;
skb_pull_rcsum(skb, hdr_size);
skb_reset_mac_header(skb);
@@ -470,7 +470,7 @@ void batadv_interface_rx(struct net_device *soft_iface,
/* Let the bridge loop avoidance check the packet. If will
* not handle it, we can safely push it up.
*/
- if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
+ if (batadv_bla_rx(bat_priv, skb, vid, packet_type))
goto out;
if (orig_node)
4 months, 1 week
[batman-adv] master: batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh (ad787058)
by postmaster＠open-mesh.org
Repository : ssh://git@diktynna/batman-adv
On branch : master
>---------------------------------------------------------------
commit ad787058909ed6215c37e3445d5214a174b01398
Author: Linus L��ssing <linus.luessing(a)c0d3.blue>
Date: Tue Sep 15 09:54:10 2020 +0200
batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
Scenario:
* Multicast frame send from BLA backbone gateways (multiple nodes
with their bat0 bridged together, with BLA enabled) sharing the same
LAN to nodes in the mesh
Issue:
* Nodes receive the frame multiple times on bat0 from the mesh,
once from each foreign BLA backbone gateway which shares the same LAN
with another
For multicast frames via batman-adv broadcast packets coming from the
same BLA backbone but from different backbone gateways duplicates are
currently detected via a CRC history of previously received packets.
However this CRC so far was not performed for multicast frames received
via batman-adv unicast packets. Fixing this by appyling the same check
for such packets, too.
Room for improvements in the future: Ideally we would introduce the
possibility to not only claim a client, but a complete originator, too.
This would allow us to only send a multicast-in-unicast packet from a BLA
backbone gateway claiming the node and by that avoid potential redundant
transmissions in the first place.
Fixes: e5cf86d30a9b ("batman-adv: add broadcast duplicate check")
Signed-off-by: Linus L��ssing <linus.luessing(a)c0d3.blue>
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
>---------------------------------------------------------------
ad787058909ed6215c37e3445d5214a174b01398
net/batman-adv/bridge_loop_avoidance.c | 103 ++++++++++++++++++++++++++++-----
1 file changed, 87 insertions(+), 16 deletions(-)
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 68715783..c350ab63 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -1581,13 +1581,16 @@ int batadv_bla_init(struct batadv_priv *bat_priv)
}
/**
- * batadv_bla_check_bcast_duplist() - Check if a frame is in the broadcast dup.
+ * batadv_bla_check_duplist() - Check if a frame is in the broadcast dup.
* @bat_priv: the bat priv with all the soft interface information
- * @skb: contains the bcast_packet to be checked
+ * @skb: contains the multicast packet to be checked
+ * @payload_ptr: pointer to position inside the head buffer of the skb
+ * marking the start of the data to be CRC'ed
+ * @orig: originator mac address, NULL if unknown
*
- * check if it is on our broadcast list. Another gateway might
- * have sent the same packet because it is connected to the same backbone,
- * so we have to remove this duplicate.
+ * Check if it is on our broadcast list. Another gateway might have sent the
+ * same packet because it is connected to the same backbone, so we have to
+ * remove this duplicate.
*
* This is performed by checking the CRC, which will tell us
* with a good chance that it is the same packet. If it is furthermore
@@ -1596,19 +1599,17 @@ int batadv_bla_init(struct batadv_priv *bat_priv)
*
* Return: true if a packet is in the duplicate list, false otherwise.
*/
-bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
- struct sk_buff *skb)
+static bool batadv_bla_check_duplist(struct batadv_priv *bat_priv,
+ struct sk_buff *skb, u8 *payload_ptr,
+ const u8 *orig)
{
- int i, curr;
- __be32 crc;
- struct batadv_bcast_packet *bcast_packet;
struct batadv_bcast_duplist_entry *entry;
bool ret = false;
-
- bcast_packet = (struct batadv_bcast_packet *)skb->data;
+ int i, curr;
+ __be32 crc;
/* calculate the crc ... */
- crc = batadv_skb_crc32(skb, (u8 *)(bcast_packet + 1));
+ crc = batadv_skb_crc32(skb, payload_ptr);
spin_lock_bh(&bat_priv->bla.bcast_duplist_lock);
@@ -1627,8 +1628,21 @@ bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
if (entry->crc != crc)
continue;
- if (batadv_compare_eth(entry->orig, bcast_packet->orig))
- continue;
+ /* are the originators both known and not anonymous? */
+ if (orig && !is_zero_ether_addr(orig) &&
+ !is_zero_ether_addr(entry->orig)) {
+ /* If known, check if the new frame came from
+ * the same originator:
+ * We are safe to take identical frames from the
+ * same orig, if known, as multiplications in
+ * the mesh are detected via the (orig, seqno) pair.
+ * So we can be a bit more liberal here and allow
+ * identical frames from the same orig which the source
+ * host might have sent multiple times on purpose.
+ */
+ if (batadv_compare_eth(entry->orig, orig))
+ continue;
+ }
/* this entry seems to match: same crc, not too old,
* and from another gw. therefore return true to forbid it.
@@ -1644,7 +1658,14 @@ bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
entry = &bat_priv->bla.bcast_duplist[curr];
entry->crc = crc;
entry->entrytime = jiffies;
- ether_addr_copy(entry->orig, bcast_packet->orig);
+
+ /* known originator */
+ if (orig)
+ ether_addr_copy(entry->orig, orig);
+ /* anonymous originator */
+ else
+ eth_zero_addr(entry->orig);
+
bat_priv->bla.bcast_duplist_curr = curr;
out:
@@ -1653,6 +1674,48 @@ out:
return ret;
}
+/**
+ * batadv_bla_check_ucast_duplist() - Check if a frame is in the broadcast dup.
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: contains the multicast packet to be checked, decapsulated from a
+ * unicast_packet
+ *
+ * Check if it is on our broadcast list. Another gateway might have sent the
+ * same packet because it is connected to the same backbone, so we have to
+ * remove this duplicate.
+ *
+ * Return: true if a packet is in the duplicate list, false otherwise.
+ */
+static bool batadv_bla_check_ucast_duplist(struct batadv_priv *bat_priv,
+ struct sk_buff *skb)
+{
+ return batadv_bla_check_duplist(bat_priv, skb, (u8 *)skb->data, NULL);
+}
+
+/**
+ * batadv_bla_check_bcast_duplist() - Check if a frame is in the broadcast dup.
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: contains the bcast_packet to be checked
+ *
+ * Check if it is on our broadcast list. Another gateway might have sent the
+ * same packet because it is connected to the same backbone, so we have to
+ * remove this duplicate.
+ *
+ * Return: true if a packet is in the duplicate list, false otherwise.
+ */
+bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
+ struct sk_buff *skb)
+{
+ struct batadv_bcast_packet *bcast_packet;
+ u8 *payload_ptr;
+
+ bcast_packet = (struct batadv_bcast_packet *)skb->data;
+ payload_ptr = (u8 *)(bcast_packet + 1);
+
+ return batadv_bla_check_duplist(bat_priv, skb, payload_ptr,
+ bcast_packet->orig);
+}
+
/**
* batadv_bla_is_backbone_gw_orig() - Check if the originator is a gateway for
* the VLAN identified by vid.
@@ -1867,6 +1930,14 @@ bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
packet_type == BATADV_UNICAST)
goto handled;
+ /* potential duplicates from foreign BLA backbone gateways via
+ * multicast-in-unicast packets
+ */
+ if (is_multicast_ether_addr(ethhdr->h_dest) &&
+ packet_type == BATADV_UNICAST &&
+ batadv_bla_check_ucast_duplist(bat_priv, skb))
+ goto handled;
+
ether_addr_copy(search_claim.addr, ethhdr->h_source);
search_claim.vid = vid;
claim = batadv_claim_hash_find(bat_priv, &search_claim);
4 months, 1 week
[batman-adv] master: Merge branch 'maint' into master (2552daa1)
by postmaster＠open-mesh.org
Repository : ssh://git@diktynna/batman-adv
On branch : master
>---------------------------------------------------------------
commit 2552daa11b9fa5af08e8b27edd789af4bbb000eb
Merge: 8fdbf2ff ad787058
Author: Sven Eckelmann <sven(a)narfation.org>
Date: Tue Sep 15 18:15:12 2020 +0200
Merge branch 'maint' into master
>---------------------------------------------------------------
2552daa11b9fa5af08e8b27edd789af4bbb000eb
net/batman-adv/bridge_loop_avoidance.c | 138 +++++++++++++++++++++++++++------
net/batman-adv/bridge_loop_avoidance.h | 4 +-
net/batman-adv/multicast.c | 46 ++++++++---
net/batman-adv/multicast.h | 15 ++++
net/batman-adv/routing.c | 4 +
net/batman-adv/soft-interface.c | 11 ++-
6 files changed, 175 insertions(+), 43 deletions(-)
4 months, 1 week