From 021b97e469714b31b9e808c91b49543a8766c342 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?YOSHIFUJI=20Hideaki=20/=20=E5=90=89=E8=97=A4=E8=8B=B1?=
=?UTF-8?q?=E6=98=8E?= <yoshfuji@linux-ipv6.org>
Date: Mon, 25 Mar 2013 08:25:48 +0000
Subject: [PATCH] firewire net: Send L2 multicast via GASP.
Send L2 multicast packet via GASP (Global asynchronous stream packet) by
seeing the multicast bit in the L2 hardware address, not by seeing upper-
layer protocol address.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/firewire/net.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c
index d438c5be8c21..7c2e16a1db4f 100644
--- a/drivers/firewire/net.c
+++ b/drivers/firewire/net.c
@@ -84,6 +84,11 @@ struct fwnet_header {
__be16 h_proto; /* packet type ID field */
} __packed;
+static bool fwnet_hwaddr_is_multicast(u8 *ha)
+{
+ return !!(*ha & 1);
+}
+
/* IPv4 and IPv6 encapsulation header */
struct rfc2734_header {
u32 w0;
@@ -626,7 +631,7 @@ static int fwnet_finish_incoming_packet(struct net_device *net,
skb_reset_mac_header(skb);
skb_pull(skb, sizeof(*eth));
eth = (struct fwnet_header *)skb_mac_header(skb);
- if (*eth->h_dest & 1) {
+ if (fwnet_hwaddr_is_multicast(eth->h_dest)) {
if (memcmp(eth->h_dest, net->broadcast,
net->addr_len) == 0)
skb->pkt_type = PACKET_BROADCAST;
@@ -1366,10 +1371,7 @@ static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net)
* Set the transmission type for the packet. ARP packets and IP
* broadcast packets are sent via GASP.
*/
- if (memcmp(hdr_buf.h_dest, net->broadcast, FWNET_ALEN) == 0
- || proto == htons(ETH_P_ARP)
- || (proto == htons(ETH_P_IP)
- && IN_MULTICAST(ntohl(ip_hdr(skb)->daddr)))) {
+ if (fwnet_hwaddr_is_multicast(hdr_buf.h_dest)) {
max_payload = dev->broadcast_xmt_max_payload;
datagram_label_ptr = &dev->broadcast_xmt_datagramlabel;
--
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