Against the below condition code in Ip4Route():
//
// We will always try to use the direct destination address when /32 subnet
mask is used.
//
if (RtEntry == NULL && SubnetMask != IP4_ALLONE_ADDRESS) {
return NULL;
}
If there is no default route { Dest: 0.0.0.0, Mask:
Hi, Jiaxin
The IP4 routing logic for /32 subnet mask can be explain as below, maybe I need
to add it to the commit log or in code comments.
Ip4Output() is called to send a packet
If a matching route cache (src, dest -> xxx) can be find,
send the packet to address xxx
Hi Siyuan,
Below is my code review understanding, maybe something is wrong, please correct
me.
> The "default route" means a route entry with zero SubnetAddress and zero
> SubnetMask, which will match all the dest address that can't match any other
> non-zero Subnet* route entry.
> The
Hi, Jiaxin
The "default route" means a route entry with zero SubnetAddress and zero
SubnetMask, which will match all the dest address that can't match any other
non-zero Subnet* route entry.
The "instance route table" is a list of route entries which belong to an IP
child instance.
The
Hi Siyuan,
In Ip4SendFrameToDefaultRoute(), you tried to find the default gateway IP
address by using the found RtCacheEntry->Tag, I'm confused why it's the default
gateway? In my understanding, tag is the cache's corresponding route entry.
Besides, why we must send the frame to
This patch updates IP4 stack to support 32bit subnet mask in PXE boot process.
When 32bit subnet mask is used, the IP4 driver couldn't use the subnet mask to
determine
whether destination IP address is on-link or not, so it will always try to send
all the
packets to the destination IP address
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