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net: clean up usbnet_receive()

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The USB network interface has two code paths depending on whether or not
RNDIS mode is enabled.  Refactor usbnet_receive() so that there is a
common path throughout the function instead of duplicating everything
across if (is_rndis(s)) ... else ... code paths.

Clean up coding style and 80 character line wrap along the way.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This commit is contained in:
Stefan Hajnoczi 2012-08-24 13:32:16 +01:00 committed by Stefan Hajnoczi
parent 08d12022c7
commit f237ddbb89
1 changed files with 17 additions and 13 deletions
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30
hw/usb/dev-network.c
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@ -1250,20 +1250,27 @@ static int usb_net_handle_data(USBDevice *dev, USBPacket *p)
static ssize_t usbnet_receive(NetClientState *nc, const uint8_t *buf, size_t size)
{
USBNetState *s = DO_UPCAST(NICState, nc, nc)->opaque;
struct rndis_packet_msg_type *msg;
uint8_t *in_buf = s->in_buf;
size_t total_size = size;
if (is_rndis(s)) {
msg = (struct rndis_packet_msg_type *) s->in_buf;
if (s->rndis_state != RNDIS_DATA_INITIALIZED) {
return -1;
}
if (size + sizeof(struct rndis_packet_msg_type) > sizeof(s->in_buf))
return -1;
total_size += sizeof(struct rndis_packet_msg_type);
}
if (total_size > sizeof(s->in_buf)) {
return -1;
}
if (is_rndis(s)) {
struct rndis_packet_msg_type *msg;
msg = (struct rndis_packet_msg_type *)in_buf;
memset(msg, 0, sizeof(struct rndis_packet_msg_type));
msg->MessageType = cpu_to_le32(RNDIS_PACKET_MSG);
msg->MessageLength = cpu_to_le32(size + sizeof(struct rndis_packet_msg_type));
msg->DataOffset = cpu_to_le32(sizeof(struct rndis_packet_msg_type) - 8);
msg->MessageLength = cpu_to_le32(size + sizeof(*msg));
msg->DataOffset = cpu_to_le32(sizeof(*msg) - 8);
msg->DataLength = cpu_to_le32(size);
/* msg->OOBDataOffset;
* msg->OOBDataLength;
@ -1273,14 +1280,11 @@ static ssize_t usbnet_receive(NetClientState *nc, const uint8_t *buf, size_t siz
* msg->VcHandle;
* msg->Reserved;
*/
memcpy(msg + 1, buf, size);
s->in_len = size + sizeof(struct rndis_packet_msg_type);
} else {
if (size > sizeof(s->in_buf))
return -1;
memcpy(s->in_buf, buf, size);
s->in_len = size;
in_buf += sizeof(*msg);
}
memcpy(in_buf, buf, size);
s->in_len = total_size;
s->in_ptr = 0;
return size;
}