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From f3f975860db11101ccef2f75238032328de00ce0 Mon Sep 17 00:00:00 2001
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From: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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Date: Fri, 24 Aug 2012 13:32:16 +0100
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Subject: [PATCH] net: clean up usbnet_receive()
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The USB network interface has two code paths depending on whether or not
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RNDIS mode is enabled. Refactor usbnet_receive() so that there is a
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common path throughout the function instead of duplicating everything
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across if (is_rndis(s)) ... else ... code paths.
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Clean up coding style and 80 character line wrap along the way.
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Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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(cherry picked from commit f237ddbb89142c6948a2257c459e49dee7500a7c)
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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hw/usb/dev-network.c | 30 +++++++++++++++++-------------
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1 file changed, 17 insertions(+), 13 deletions(-)
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diff --git a/hw/usb/dev-network.c b/hw/usb/dev-network.c
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index c84892c..0b5cb71 100644
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--- a/hw/usb/dev-network.c
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+++ b/hw/usb/dev-network.c
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@@ -1250,20 +1250,27 @@ static int usb_net_handle_data(USBDevice *dev, USBPacket *p)
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static ssize_t usbnet_receive(NetClientState *nc, const uint8_t *buf, size_t size)
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{
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USBNetState *s = DO_UPCAST(NICState, nc, nc)->opaque;
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- struct rndis_packet_msg_type *msg;
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+ uint8_t *in_buf = s->in_buf;
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+ size_t total_size = size;
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if (is_rndis(s)) {
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- msg = (struct rndis_packet_msg_type *) s->in_buf;
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if (s->rndis_state != RNDIS_DATA_INITIALIZED) {
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return -1;
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}
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- if (size + sizeof(struct rndis_packet_msg_type) > sizeof(s->in_buf))
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- return -1;
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+ total_size += sizeof(struct rndis_packet_msg_type);
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+ }
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+ if (total_size > sizeof(s->in_buf)) {
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+ return -1;
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+ }
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+ if (is_rndis(s)) {
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+ struct rndis_packet_msg_type *msg;
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+
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+ msg = (struct rndis_packet_msg_type *)in_buf;
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memset(msg, 0, sizeof(struct rndis_packet_msg_type));
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msg->MessageType = cpu_to_le32(RNDIS_PACKET_MSG);
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- msg->MessageLength = cpu_to_le32(size + sizeof(struct rndis_packet_msg_type));
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- msg->DataOffset = cpu_to_le32(sizeof(struct rndis_packet_msg_type) - 8);
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+ msg->MessageLength = cpu_to_le32(size + sizeof(*msg));
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+ msg->DataOffset = cpu_to_le32(sizeof(*msg) - 8);
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msg->DataLength = cpu_to_le32(size);
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/* msg->OOBDataOffset;
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* msg->OOBDataLength;
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@@ -1273,14 +1280,11 @@ static ssize_t usbnet_receive(NetClientState *nc, const uint8_t *buf, size_t siz
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* msg->VcHandle;
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* msg->Reserved;
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*/
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- memcpy(msg + 1, buf, size);
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- s->in_len = size + sizeof(struct rndis_packet_msg_type);
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- } else {
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- if (size > sizeof(s->in_buf))
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- return -1;
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- memcpy(s->in_buf, buf, size);
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- s->in_len = size;
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+ in_buf += sizeof(*msg);
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}
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+
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+ memcpy(in_buf, buf, size);
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+ s->in_len = total_size;
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s->in_ptr = 0;
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return size;
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}
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--
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1.7.12.1
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