[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>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 534650cad3a8..d6427d918512 100644
--- 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;