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freebsd/contrib/bsnmp/snmp_mibII/mibII_ip.c
Hartmut Brandt 69292ced51 Virgin import of bsnmpd 1.10
2005-05-23 11:19:11 +00:00

494 lines
11 KiB
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/*
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* All rights reserved.
*
* Author: Harti Brandt <harti@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Begemot: bsnmp/snmp_mibII/mibII_ip.c,v 1.11 2005/05/23 09:03:40 brandt_h Exp $
*
* ip group scalars.
*/
#include "mibII.h"
#include "mibII_oid.h"
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp_var.h>
static struct ipstat ipstat;
static u_int ip_idrop;
static struct icmpstat icmpstat;
static int ip_forwarding;
static int ip_defttl;
static uint64_t ip_tick;
static uint64_t ipstat_tick;
static int
fetch_ipstat(void)
{
size_t len;
len = sizeof(ipstat);
if (sysctlbyname("net.inet.ip.stats", &ipstat, &len, NULL, 0) == -1) {
syslog(LOG_ERR, "net.inet.ip.stats: %m");
return (-1);
}
if (len != sizeof(ipstat)) {
syslog(LOG_ERR, "net.inet.ip.stats: wrong size");
return (-1);
}
len = sizeof(ip_idrop);
if (sysctlbyname("net.inet.ip.intr_queue_drops", &ip_idrop, &len, NULL, 0) == -1)
syslog(LOG_WARNING, "net.inet.ip.intr_queue_drops: %m");
if (len != sizeof(ip_idrop)) {
syslog(LOG_WARNING, "net.inet.ip.intr_queue_drops: wrong size");
ip_idrop = 0;
}
len = sizeof(icmpstat);
if (sysctlbyname("net.inet.icmp.stats", &icmpstat, &len, NULL, 0) == -1) {
syslog(LOG_ERR, "net.inet.icmp.stats: %m");
return (-1);
}
if (len != sizeof(icmpstat)) {
syslog(LOG_ERR, "net.inet.icmp.stats: wrong size");
return (-1);
}
ipstat_tick = get_ticks();
return (0);
}
static int
fetch_ip(void)
{
size_t len;
len = sizeof(ip_forwarding);
if (sysctlbyname("net.inet.ip.forwarding", &ip_forwarding, &len,
NULL, 0) == -1) {
syslog(LOG_ERR, "net.inet.ip.forwarding: %m");
return (-1);
}
if (len != sizeof(ip_forwarding)) {
syslog(LOG_ERR, "net.inet.ip.forwarding: wrong size");
return (-1);
}
len = sizeof(ip_defttl);
if (sysctlbyname("net.inet.ip.ttl", &ip_defttl, &len,
NULL, 0) == -1) {
syslog(LOG_ERR, "net.inet.ip.ttl: %m");
return (-1);
}
if (len != sizeof(ip_defttl)) {
syslog(LOG_ERR, "net.inet.ip.ttl: wrong size");
return (-1);
}
ip_tick = get_ticks();
return (0);
}
static int
ip_forward(int forw, int *old)
{
size_t olen;
olen = sizeof(*old);
if (sysctlbyname("net.inet.ip.forwarding", old, old ? &olen : NULL,
&forw, sizeof(forw)) == -1) {
syslog(LOG_ERR, "set net.inet.ip.forwarding: %m");
return (-1);
}
ip_forwarding = forw;
return (0);
}
static int
ip_setttl(int ttl, int *old)
{
size_t olen;
olen = sizeof(*old);
if (sysctlbyname("net.inet.ip.ttl", old, old ? &olen : NULL,
&ttl, sizeof(ttl)) == -1) {
syslog(LOG_ERR, "set net.inet.ip.ttl: %m");
return (-1);
}
ip_defttl = ttl;
return (0);
}
/*
* READ/WRITE ip group.
*/
int
op_ip(struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int idx __unused, enum snmp_op op)
{
int old;
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
break;
case SNMP_OP_SET:
if (ip_tick < this_tick)
if (fetch_ip() == -1)
return (SNMP_ERR_GENERR);
switch (value->var.subs[sub - 1]) {
case LEAF_ipForwarding:
ctx->scratch->int1 = ip_forwarding ? 1 : 2;
ctx->scratch->int2 = value->v.integer;
if (value->v.integer == 1) {
if (!ip_forwarding && ip_forward(1, &old))
return (SNMP_ERR_GENERR);
ctx->scratch->int1 = old ? 1 : 2;
} else if (value->v.integer == 2) {
if (ip_forwarding && ip_forward(0, &old))
return (SNMP_ERR_GENERR);
ctx->scratch->int1 = old;
} else
return (SNMP_ERR_WRONG_VALUE);
break;
case LEAF_ipDefaultTTL:
ctx->scratch->int1 = ip_defttl;
ctx->scratch->int2 = value->v.integer;
if (value->v.integer < 1 || value->v.integer > 255)
return (SNMP_ERR_WRONG_VALUE);
if (ip_defttl != value->v.integer &&
ip_setttl(value->v.integer, &old))
return (SNMP_ERR_GENERR);
ctx->scratch->int1 = old;
break;
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_ROLLBACK:
switch (value->var.subs[sub - 1]) {
case LEAF_ipForwarding:
if (ctx->scratch->int1 == 1) {
if (ctx->scratch->int2 == 2)
(void)ip_forward(1, NULL);
} else {
if (ctx->scratch->int2 == 1)
(void)ip_forward(0, NULL);
}
break;
case LEAF_ipDefaultTTL:
if (ctx->scratch->int1 != ctx->scratch->int2)
(void)ip_setttl(ctx->scratch->int1, NULL);
break;
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_COMMIT:
return (SNMP_ERR_NOERROR);
}
if (ip_tick < this_tick)
if (fetch_ip() == -1)
return (SNMP_ERR_GENERR);
switch (value->var.subs[sub - 1]) {
case LEAF_ipForwarding:
value->v.integer = ip_forwarding ? 1 : 2;
break;
case LEAF_ipDefaultTTL:
value->v.integer = ip_defttl;
break;
}
return (SNMP_ERR_NOERROR);
}
/*
* READ-ONLY statistics ip group.
*/
int
op_ipstat(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int idx __unused, enum snmp_op op)
{
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
break;
case SNMP_OP_SET:
return (SNMP_ERR_NOT_WRITEABLE);
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
abort();
}
if (ipstat_tick < this_tick)
fetch_ipstat();
switch (value->var.subs[sub - 1]) {
case LEAF_ipInReceives:
value->v.uint32 = ipstat.ips_total;
break;
case LEAF_ipInHdrErrors:
value->v.uint32 = ipstat.ips_badsum + ipstat.ips_tooshort
+ ipstat.ips_toosmall + ipstat.ips_badhlen
+ ipstat.ips_badlen + ipstat.ips_badvers +
+ ipstat.ips_toolong;
break;
case LEAF_ipInAddrErrors:
value->v.uint32 = ipstat.ips_cantforward;
break;
case LEAF_ipForwDatagrams:
value->v.uint32 = ipstat.ips_forward;
break;
case LEAF_ipInUnknownProtos:
value->v.uint32 = ipstat.ips_noproto;
break;
case LEAF_ipInDiscards:
value->v.uint32 = ip_idrop;
break;
case LEAF_ipInDelivers:
value->v.uint32 = ipstat.ips_delivered;
break;
case LEAF_ipOutRequests:
value->v.uint32 = ipstat.ips_localout;
break;
case LEAF_ipOutDiscards:
value->v.uint32 = ipstat.ips_odropped;
break;
case LEAF_ipOutNoRoutes:
value->v.uint32 = ipstat.ips_noroute;
break;
case LEAF_ipReasmTimeout:
value->v.integer = IPFRAGTTL;
break;
case LEAF_ipReasmReqds:
value->v.uint32 = ipstat.ips_fragments;
break;
case LEAF_ipReasmOKs:
value->v.uint32 = ipstat.ips_reassembled;
break;
case LEAF_ipReasmFails:
value->v.uint32 = ipstat.ips_fragdropped
+ ipstat.ips_fragtimeout;
break;
case LEAF_ipFragOKs:
value->v.uint32 = ipstat.ips_fragmented;
break;
case LEAF_ipFragFails:
value->v.uint32 = ipstat.ips_cantfrag;
break;
case LEAF_ipFragCreates:
value->v.uint32 = ipstat.ips_ofragments;
break;
}
return (SNMP_ERR_NOERROR);
}
/*
* READ-ONLY statistics icmp group.
*/
int
op_icmpstat(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int idx __unused, enum snmp_op op)
{
u_int i;
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
break;
case SNMP_OP_SET:
return (SNMP_ERR_NOT_WRITEABLE);
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
abort();
}
if (ipstat_tick < this_tick)
fetch_ipstat();
switch (value->var.subs[sub - 1]) {
case LEAF_icmpInMsgs:
value->v.integer = 0;
for (i = 0; i <= ICMP_MAXTYPE; i++)
value->v.integer += icmpstat.icps_inhist[i];
value->v.integer += icmpstat.icps_tooshort +
icmpstat.icps_checksum;
/* missing: bad type and packets on faith */
break;
case LEAF_icmpInErrors:
value->v.integer = icmpstat.icps_tooshort +
icmpstat.icps_checksum +
icmpstat.icps_badlen +
icmpstat.icps_badcode +
icmpstat.icps_bmcastecho +
icmpstat.icps_bmcasttstamp;
break;
case LEAF_icmpInDestUnreachs:
value->v.integer = icmpstat.icps_inhist[ICMP_UNREACH];
break;
case LEAF_icmpInTimeExcds:
value->v.integer = icmpstat.icps_inhist[ICMP_TIMXCEED];
break;
case LEAF_icmpInParmProbs:
value->v.integer = icmpstat.icps_inhist[ICMP_PARAMPROB];
break;
case LEAF_icmpInSrcQuenchs:
value->v.integer = icmpstat.icps_inhist[ICMP_SOURCEQUENCH];
break;
case LEAF_icmpInRedirects:
value->v.integer = icmpstat.icps_inhist[ICMP_REDIRECT];
break;
case LEAF_icmpInEchos:
value->v.integer = icmpstat.icps_inhist[ICMP_ECHO];
break;
case LEAF_icmpInEchoReps:
value->v.integer = icmpstat.icps_inhist[ICMP_ECHOREPLY];
break;
case LEAF_icmpInTimestamps:
value->v.integer = icmpstat.icps_inhist[ICMP_TSTAMP];
break;
case LEAF_icmpInTimestampReps:
value->v.integer = icmpstat.icps_inhist[ICMP_TSTAMPREPLY];
break;
case LEAF_icmpInAddrMasks:
value->v.integer = icmpstat.icps_inhist[ICMP_MASKREQ];
break;
case LEAF_icmpInAddrMaskReps:
value->v.integer = icmpstat.icps_inhist[ICMP_MASKREPLY];
break;
case LEAF_icmpOutMsgs:
value->v.integer = 0;
for (i = 0; i <= ICMP_MAXTYPE; i++)
value->v.integer += icmpstat.icps_outhist[i];
value->v.integer += icmpstat.icps_badaddr +
icmpstat.icps_noroute;
break;
case LEAF_icmpOutErrors:
value->v.integer = icmpstat.icps_badaddr +
icmpstat.icps_noroute;
break;
case LEAF_icmpOutDestUnreachs:
value->v.integer = icmpstat.icps_outhist[ICMP_UNREACH];
break;
case LEAF_icmpOutTimeExcds:
value->v.integer = icmpstat.icps_outhist[ICMP_TIMXCEED];
break;
case LEAF_icmpOutParmProbs:
value->v.integer = icmpstat.icps_outhist[ICMP_PARAMPROB];
break;
case LEAF_icmpOutSrcQuenchs:
value->v.integer = icmpstat.icps_outhist[ICMP_SOURCEQUENCH];
break;
case LEAF_icmpOutRedirects:
value->v.integer = icmpstat.icps_outhist[ICMP_REDIRECT];
break;
case LEAF_icmpOutEchos:
value->v.integer = icmpstat.icps_outhist[ICMP_ECHO];
break;
case LEAF_icmpOutEchoReps:
value->v.integer = icmpstat.icps_outhist[ICMP_ECHOREPLY];
break;
case LEAF_icmpOutTimestamps:
value->v.integer = icmpstat.icps_outhist[ICMP_TSTAMP];
break;
case LEAF_icmpOutTimestampReps:
value->v.integer = icmpstat.icps_outhist[ICMP_TSTAMPREPLY];
break;
case LEAF_icmpOutAddrMasks:
value->v.integer = icmpstat.icps_outhist[ICMP_MASKREQ];
break;
case LEAF_icmpOutAddrMaskReps:
value->v.integer = icmpstat.icps_outhist[ICMP_MASKREPLY];
break;
}
return (SNMP_ERR_NOERROR);
}
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