net: add return value to packet receive handler
This allows us to handle queue full conditions rather than dropping
the packet on the floor.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
diff --git a/hw/pcnet.c b/hw/pcnet.c
index a8297df..b5793ff 100644
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -1076,16 +1076,17 @@
#define MIN_BUF_SIZE 60
-static void pcnet_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
+static ssize_t pcnet_receive(VLANClientState *vc, const uint8_t *buf, size_t size_)
{
PCNetState *s = vc->opaque;
int is_padr = 0, is_bcast = 0, is_ladr = 0;
uint8_t buf1[60];
int remaining;
int crc_err = 0;
+ int size = size_;
if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size)
- return;
+ return -1;
#ifdef PCNET_DEBUG
printf("pcnet_receive size=%d\n", size);
@@ -1252,6 +1253,8 @@
pcnet_poll(s);
pcnet_update_irq(s);
+
+ return size_;
}
static void pcnet_transmit(PCNetState *s)
