mirror of https://github.com/hak5/openwrt.git
84 lines
3.2 KiB
Diff
84 lines
3.2 KiB
Diff
|
|
|
|
From: Pascal Hambourg <pascal@plouf.fr.eu.org>
|
|
Date: Wed, 17 Aug 2011 08:37:18 +0200
|
|
Subject: [PATCH 1/2] atm: br2684: Make headroom and hard_header_len depend on the payload type
|
|
|
|
Routed payload requires less headroom than bridged payload.
|
|
So do not reallocate headroom if not needed.
|
|
Also, add worst case AAL5 overhead to netdev->hard_header_len.
|
|
|
|
Signed-off-by: Pascal Hambourg <pascal@plouf.fr.eu.org>
|
|
Signed-off-by: chas williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
|
|
---
|
|
net/atm/br2684.c | 8 ++++++--
|
|
1 files changed, 6 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
|
|
index 53b0aa1..ed72263 100644
|
|
--- a/net/atm/br2684.c
|
|
+++ b/net/atm/br2684.c
|
|
@@ -202,7 +202,10 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
|
|
{
|
|
struct br2684_dev *brdev = BRPRIV(dev);
|
|
struct atm_vcc *atmvcc;
|
|
- int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
|
|
+ int minheadroom = (brvcc->encaps == e_llc) ?
|
|
+ ((brdev->payload == p_bridged) ?
|
|
+ sizeof(llc_oui_pid_pad) : sizeof(llc_oui_ipv4)) :
|
|
+ ((brdev->payload == p_bridged) ? BR2684_PAD_LEN : 0);
|
|
|
|
if (skb_headroom(skb) < minheadroom) {
|
|
struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
|
|
@@ -583,6 +586,7 @@ static void br2684_setup(struct net_device *netdev)
|
|
struct br2684_dev *brdev = BRPRIV(netdev);
|
|
|
|
ether_setup(netdev);
|
|
+ netdev->hard_header_len += sizeof(llc_oui_pid_pad); /* worst case */
|
|
brdev->net_dev = netdev;
|
|
|
|
netdev->netdev_ops = &br2684_netdev_ops;
|
|
@@ -595,7 +599,7 @@ static void br2684_setup_routed(struct net_device *netdev)
|
|
struct br2684_dev *brdev = BRPRIV(netdev);
|
|
|
|
brdev->net_dev = netdev;
|
|
- netdev->hard_header_len = 0;
|
|
+ netdev->hard_header_len = sizeof(llc_oui_ipv4); /* worst case */
|
|
netdev->netdev_ops = &br2684_netdev_ops_routed;
|
|
netdev->addr_len = 0;
|
|
netdev->mtu = 1500;
|
|
|
|
From: Pascal Hambourg <pascal@plouf.fr.eu.org>
|
|
Date: Wed, 17 Aug 2011 08:37:52 +0200
|
|
Subject: [PATCH 2/2] atm: br2684: Avoid alignment issues
|
|
|
|
Use memcmp() instead of cast to u16 when checking the PAD field.
|
|
|
|
Signed-off-by: Pascal Hambourg <pascal@plouf.fr.eu.org>
|
|
Signed-off-by: chas williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
|
|
---
|
|
net/atm/br2684.c | 3 ++-
|
|
1 files changed, 2 insertions(+), 1 deletions(-)
|
|
|
|
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
|
|
index ed72263..353fccf 100644
|
|
--- a/net/atm/br2684.c
|
|
+++ b/net/atm/br2684.c
|
|
@@ -53,6 +53,7 @@ static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
|
|
static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
|
|
static const unsigned char llc_oui_pid_pad[] =
|
|
{ LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
|
|
+static const unsigned char pad[] = { PAD_BRIDGED };
|
|
static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
|
|
static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
|
|
|
|
@@ -453,7 +454,7 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
|
|
skb->pkt_type = PACKET_HOST;
|
|
} else { /* p_bridged */
|
|
/* first 2 chars should be 0 */
|
|
- if (*((u16 *) (skb->data)) != 0)
|
|
+ if (memcmp(skb->data, pad, BR2684_PAD_LEN) != 0)
|
|
goto error;
|
|
skb_pull(skb, BR2684_PAD_LEN);
|
|
skb->protocol = eth_type_trans(skb, net_dev);
|