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[IPV6] SNMP: Fix {In,Out}NoRoutes statistics. 

A packet which is being discarded because of no routes in the
forwarding path should not be counted as OutNoRoutes but as
InNoRoutes.
Additionally, on this occasion, a packet whose destinaion is
not valid should be counted as InAddrErrors separately.

Based on patch from Mitsuru Chinen <mitch@linux.vnet.ibm.com>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2007-04-13 16:18:02 -07:00 committed by David S. Miller
parent 661697f728
commit 612f09e849
1 changed files with 19 additions and 10 deletions
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29
net/ipv6/route.c
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@ -1766,13 +1766,22 @@ int ipv6_route_ioctl(unsigned int cmd, void __user *arg)
* Drop the packet on the floor
*/
static inline int ip6_pkt_drop(struct sk_buff *skb, int code)
static inline int ip6_pkt_drop(struct sk_buff *skb, int code,
int ipstats_mib_noroutes)
{
int type = ipv6_addr_type(&skb->nh.ipv6h->daddr);
if (type == IPV6_ADDR_ANY || type == IPV6_ADDR_RESERVED)
IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INADDRERRORS);
IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_OUTNOROUTES);
int type;
switch (ipstats_mib_noroutes) {
case IPSTATS_MIB_INNOROUTES:
type = ipv6_addr_type(&skb->nh.ipv6h->daddr);
if (type == IPV6_ADDR_ANY || type == IPV6_ADDR_RESERVED) {
IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INADDRERRORS);
break;
}
/* FALLTHROUGH */
case IPSTATS_MIB_OUTNOROUTES:
IP6_INC_STATS(ip6_dst_idev(skb->dst), ipstats_mib_noroutes);
break;
}
icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0, skb->dev);
kfree_skb(skb);
return 0;
@ -1780,26 +1789,26 @@ static inline int ip6_pkt_drop(struct sk_buff *skb, int code)
static int ip6_pkt_discard(struct sk_buff *skb)
{
return ip6_pkt_drop(skb, ICMPV6_NOROUTE);
return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES);
}
static int ip6_pkt_discard_out(struct sk_buff *skb)
{
skb->dev = skb->dst->dev;
return ip6_pkt_discard(skb);
return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
}
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
static int ip6_pkt_prohibit(struct sk_buff *skb)
{
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED);
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
}
static int ip6_pkt_prohibit_out(struct sk_buff *skb)
{
skb->dev = skb->dst->dev;
return ip6_pkt_prohibit(skb);
return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
}
static int ip6_pkt_blk_hole(struct sk_buff *skb)