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net: add return value to packet receive handler

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This allows us to handle queue full conditions rather than dropping
the packet on the floor.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
This commit is contained in:
Mark McLoughlin 2009-05-18 13:40:55 +01:00
parent e3f5ec2b5e
commit 4f1c942b7f
18 changed files with 126 additions and 95 deletions
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9
hw/usb-net.c
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@ -1369,7 +1369,7 @@ static int usb_net_handle_data(USBDevice *dev, USBPacket *p)
return ret;
}
static void usbnet_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
static ssize_t usbnet_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
{
USBNetState *s = vc->opaque;
struct rndis_packet_msg_type *msg;
@ -1377,9 +1377,9 @@ static void usbnet_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
if (s->rndis) {
msg = (struct rndis_packet_msg_type *) s->in_buf;
if (!s->rndis_state == RNDIS_DATA_INITIALIZED)
return;
return -1;
if (size + sizeof(struct rndis_packet_msg_type) > sizeof(s->in_buf))
return;
return -1;
memset(msg, 0, sizeof(struct rndis_packet_msg_type));
msg->MessageType = cpu_to_le32(RNDIS_PACKET_MSG);
@ -1398,11 +1398,12 @@ static void usbnet_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
s->in_len = size + sizeof(struct rndis_packet_msg_type);
} else {
if (size > sizeof(s->in_buf))
return;
return -1;
memcpy(s->in_buf, buf, size);
s->in_len = size;
}
s->in_ptr = 0;
return size;
}
static int usbnet_can_receive(VLANClientState *vc)