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[neighbour] Split out deferred transmission from discovery completion

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Split out the logic for transmitting any deferred packets as a
separate function, as a precursor to supporting the ability to add
deliberate latency to transmitted packets.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2026-01-05 15:53:20 +00:00
parent aabfb8a94d
commit 33c832b0d9
1 changed files with 28 additions and 14 deletions
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42
src/net/neighbour.c
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@@ -164,31 +164,20 @@ static void neighbour_discover ( struct neighbour *neighbour,
}
/**
* Complete neighbour discovery
* Transmit deferred packets
*
* @v neighbour Neighbour cache entry
* @v ll_dest Destination link-layer address
*/
static void neighbour_discovered ( struct neighbour *neighbour,
const void *ll_dest ) {
static void neighbour_tx_queue ( struct neighbour *neighbour ) {
struct net_device *netdev = neighbour->netdev;
struct ll_protocol *ll_protocol = netdev->ll_protocol;
struct net_protocol *net_protocol = neighbour->net_protocol;
const void *ll_dest = neighbour->ll_dest;
struct io_buffer *iobuf;
int rc;
/* Fill in link-layer address */
memcpy ( neighbour->ll_dest, ll_dest, ll_protocol->ll_addr_len );
DBGC ( neighbour, "NEIGHBOUR %s %s %s is %s %s\n", netdev->name,
net_protocol->name, net_protocol->ntoa ( neighbour->net_dest ),
ll_protocol->name, ll_protocol->ntoa ( neighbour->ll_dest ) );
/* Stop retransmission timer */
stop_timer ( &neighbour->timer );
/* Mark discovery as complete */
neighbour->discovery = NULL;
/* Transmit any packets in queue. Take out a temporary
* reference on the entry to prevent it from going out of
* scope during the call to net_tx().
@@ -213,6 +202,31 @@ static void neighbour_discovered ( struct neighbour *neighbour,
ref_put ( &neighbour->refcnt );
}
/**
* Complete neighbour discovery
*
* @v neighbour Neighbour cache entry
* @v ll_dest Destination link-layer address
*/
static void neighbour_discovered ( struct neighbour *neighbour,
const void *ll_dest ) {
struct net_device *netdev = neighbour->netdev;
struct ll_protocol *ll_protocol = netdev->ll_protocol;
struct net_protocol *net_protocol = neighbour->net_protocol;
/* Fill in link-layer address */
memcpy ( neighbour->ll_dest, ll_dest, ll_protocol->ll_addr_len );
DBGC ( neighbour, "NEIGHBOUR %s %s %s is %s %s\n", netdev->name,
net_protocol->name, net_protocol->ntoa ( neighbour->net_dest ),
ll_protocol->name, ll_protocol->ntoa ( neighbour->ll_dest ) );
/* Mark discovery as complete */
neighbour->discovery = NULL;
/* Transmit any deferred packets */
neighbour_tx_queue ( neighbour );
}
/**
* Destroy neighbour cache entry
*