[IPV4]: Add ICMPMsgStats MIB (RFC 4293)

Background: RFC 4293 deprecates existing individual, named ICMP
type counters to be replaced with the ICMPMsgStatsTable. This table
includes entries for both IPv4 and IPv6, and requires counting of all
ICMP types, whether or not the machine implements the type.

These patches "remove" (but not really) the existing counters, and
replace them with the ICMPMsgStats tables for v4 and v6.
It includes the named counters in the /proc places they were, but gets the
values for them from the new tables. It also counts packets generated
from raw socket output (e.g., OutEchoes, MLD queries, RA's from
radvd, etc).

Changes:
1) create icmpmsg_statistics mib
2) create icmpv6msg_statistics mib
3) modify existing counters to use these
4) modify /proc/net/snmp to add "IcmpMsg" with all ICMP types
        listed by number for easy SNMP parsing
5) modify /proc/net/snmp printing for "Icmp" to get the named data
        from new counters.

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/net/icmp.h b/include/net/icmp.h
index dc09474efcf3..9f7ef3c8baef 100644
--- a/include/net/icmp.h
+++ b/include/net/icmp.h
@@ -30,9 +30,16 @@ struct icmp_err {
 
 extern struct icmp_err icmp_err_convert[];
 DECLARE_SNMP_STAT(struct icmp_mib, icmp_statistics);
+DECLARE_SNMP_STAT(struct icmpmsg_mib, icmpmsg_statistics);
 #define ICMP_INC_STATS(field)           SNMP_INC_STATS(icmp_statistics, field)
 #define ICMP_INC_STATS_BH(field)        SNMP_INC_STATS_BH(icmp_statistics, field)
 #define ICMP_INC_STATS_USER(field)      SNMP_INC_STATS_USER(icmp_statistics, field)
+#define ICMPMSGOUT_INC_STATS(field)     SNMP_INC_STATS(icmpmsg_statistics, field+256)
+#define ICMPMSGOUT_INC_STATS_BH(field)  SNMP_INC_STATS_BH(icmpmsg_statistics, field+256)
+#define ICMPMSGOUT_INC_STATS_USER(field)        SNMP_INC_STATS_USER(icmpmsg_statistics, field+256)
+#define ICMPMSGIN_INC_STATS(field)      SNMP_INC_STATS(icmpmsg_statistics, field)
+#define ICMPMSGIN_INC_STATS_BH(field)   SNMP_INC_STATS_BH(icmpmsg_statistics, field)
+#define ICMPMSGIN_INC_STATS_USER(field) SNMP_INC_STATS_USER(icmpmsg_statistics, field)
 
 struct dst_entry;
 struct net_proto_family;
@@ -42,6 +49,7 @@ extern void	icmp_send(struct sk_buff *skb_in,  int type, int code, __be32 info);
 extern int      icmp_rcv(struct sk_buff *skb);
 extern int      icmp_ioctl(struct sock *sk, int cmd, unsigned long arg);
 extern void     icmp_init(struct net_proto_family *ops);
+extern void     icmp_out_count(unsigned char type);
 
 /* Move into dst.h ? */
 extern int      xrlim_allow(struct dst_entry *dst, int timeout);