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forward: limit the forwarding range of broadcast packets

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Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
This commit is contained in:
zhanghongyu 2023-04-18 18:25:42 +08:00 committed by Xiang Xiao
parent 4be499a243
commit 6c73221dd4
2 changed files with 20 additions and 2 deletions
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11
net/ipforward/ipv4_forward.c
View file

@ -343,7 +343,16 @@ int ipv4_forward_callback(FAR struct net_driver_s *fwddev, FAR void *arg)
FAR struct ipv4_hdr_s *ipv4;
int ret;
DEBUGASSERT(fwddev != NULL && dev != NULL && dev->d_buf != NULL);
DEBUGASSERT(fwddev != NULL);
/* Only IFF_UP device and non-loopback device need forward packet */
if (!IFF_IS_UP(fwddev->d_flags) || fwddev->d_lltype == NET_LL_LOOPBACK)
{
return OK;
}
DEBUGASSERT(dev != NULL && dev->d_buf != NULL);
/* Check if we are forwarding on the same device that we received the
* packet from.

11
net/ipforward/ipv6_forward.c
View file

@ -470,7 +470,16 @@ int ipv6_forward_callback(FAR struct net_driver_s *fwddev, FAR void *arg)
FAR struct ipv6_hdr_s *ipv6;
int ret;
DEBUGASSERT(fwddev != NULL && dev != NULL && dev->d_buf != NULL);
DEBUGASSERT(fwddev != NULL);
/* Only IFF_UP device and non-loopback device need forward packet */
if (!IFF_IS_UP(fwddev->d_flags) || fwddev->d_lltype == NET_LL_LOOPBACK)
{
return OK;
}
DEBUGASSERT(dev != NULL && dev->d_buf != NULL);
/* Check if we are forwarding on the same device that we received the
* packet from.