[IPV4] SNMP: Support OutMcastPkts and OutBcastPkts

A transmitted IP multicast datagram should be counted as OutMcastPkts.
By the same token, a transmitted IP broadcast datagram should be
counted as OutBcastPkts.

Signed-off-by: Mitsuru Chinen <mitch@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 534650c..d6427d9 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -160,9 +160,15 @@ EXPORT_SYMBOL_GPL(ip_build_and_send_pkt);
 static inline int ip_finish_output2(struct sk_buff *skb)
 {
        struct dst_entry *dst = skb->dst;
+       struct rtable *rt = (struct rtable *)dst;
        struct net_device *dev = dst->dev;
        int hh_len = LL_RESERVED_SPACE(dev);
 
+       if (rt->rt_type == RTN_MULTICAST)
+               IP_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
+       else if (rt->rt_type == RTN_BROADCAST)
+               IP_INC_STATS(IPSTATS_MIB_OUTBCASTPKTS);
+
        /* Be paranoid, rather than too clever. */
        if (unlikely(skb_headroom(skb) < hh_len && dev->hard_header)) {
                struct sk_buff *skb2;