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icmp: Obtain destination addresses from the flowsides

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icmp_sock_handler() obtains the guest address from it's most recently
observed IP.  However, this can now be obtained from the common flowside
information.

icmp_tap_handler() builds its socket address for sendto() directly
from the destination address supplied by the incoming tap packet.
This can instead be generated from the flow.

Using the flowsides as the common source of truth here prepares us for
allowing more flexible NAT and forwarding by properly initialising
that flowside information.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-07-18 15:26:38 +10:00 • committed by Stefano Brivio
parent 5cffb1bf64
commit 6d76278c21
3 changed files with 17 additions and 22 deletions

11
tap.c
View file

@ -90,17 +90,6 @@ void tap_send_single(const struct ctx *c, const void *data, size_t l2len)
tap_send_frames(c, iov, iovcnt, 1);
}
/**
* tap_ip4_daddr() - Normal IPv4 destination address for inbound packets
* @c: Execution context
*
* Return: IPv4 address
*/
struct in_addr tap_ip4_daddr(const struct ctx *c)
{
return c->ip4.addr_seen;
}
/**
* tap_ip6_daddr() - Normal IPv6 destination address for inbound packets
* @c: Execution context