freebsd-dev/contrib/bsnmp/snmp_mibII/mibII_udp.c
2004-08-06 13:38:30 +00:00

254 lines
6.4 KiB
C

/*
* 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_udp.c,v 1.6 2004/08/06 08:47:05 brandt Exp $
*
* udp
*/
#include "mibII.h"
#include "mibII_oid.h"
#include <sys/socketvar.h>
#include <netinet/in_pcb.h>
#include <netinet/udp.h>
#include <netinet/ip_var.h>
#include <netinet/udp_var.h>
struct udp_index {
struct asn_oid index;
struct xinpcb *inp;
};
static uint32_t udp_tick;
static struct udpstat udpstat;
static struct xinpgen *xinpgen;
static size_t xinpgen_len;
static u_int udp_total;
static u_int oidnum;
static struct udp_index *udpoids;
static int
udp_compare(const void *p1, const void *p2)
{
const struct udp_index *t1 = p1;
const struct udp_index *t2 = p2;
return (asn_compare_oid(&t1->index, &t2->index));
}
static int
fetch_udp(void)
{
size_t len;
struct xinpgen *ptr;
struct xinpcb *inp;
struct udp_index *oid;
in_addr_t inaddr;
len = sizeof(udpstat);
if (sysctlbyname("net.inet.udp.stats", &udpstat, &len, NULL, 0) == -1) {
syslog(LOG_ERR, "net.inet.udp.stats: %m");
return (-1);
}
if (len != sizeof(udpstat)) {
syslog(LOG_ERR, "net.inet.udp.stats: wrong size");
return (-1);
}
udp_tick = get_ticks();
len = 0;
if (sysctlbyname("net.inet.udp.pcblist", NULL, &len, NULL, 0) == -1) {
syslog(LOG_ERR, "net.inet.udp.pcblist: %m");
return (-1);
}
if (len > xinpgen_len) {
if ((ptr = realloc(xinpgen, len)) == NULL) {
syslog(LOG_ERR, "%zu: %m", len);
return (-1);
}
xinpgen = ptr;
xinpgen_len = len;
}
if (sysctlbyname("net.inet.udp.pcblist", xinpgen, &len, NULL, 0) == -1) {
syslog(LOG_ERR, "net.inet.udp.pcblist: %m");
return (-1);
}
udp_total = 0;
for (ptr = (struct xinpgen *)(void *)((char *)xinpgen + xinpgen->xig_len);
ptr->xig_len > sizeof(struct xinpgen);
ptr = (struct xinpgen *)(void *)((char *)ptr + ptr->xig_len)) {
inp = (struct xinpcb *)ptr;
if (inp->xi_inp.inp_gencnt > xinpgen->xig_gen ||
(inp->xi_inp.inp_vflag & INP_IPV4) == 0)
continue;
udp_total++;
}
if (oidnum < udp_total) {
oid = realloc(udpoids, udp_total * sizeof(udpoids[0]));
if (oid == NULL) {
free(udpoids);
oidnum = 0;
return (0);
}
udpoids = oid;
oidnum = udp_total;
}
oid = udpoids;
for (ptr = (struct xinpgen *)(void *)((char *)xinpgen + xinpgen->xig_len);
ptr->xig_len > sizeof(struct xinpgen);
ptr = (struct xinpgen *)(void *)((char *)ptr + ptr->xig_len)) {
inp = (struct xinpcb *)ptr;
if (inp->xi_inp.inp_gencnt > xinpgen->xig_gen ||
(inp->xi_inp.inp_vflag & INP_IPV4) == 0)
continue;
oid->inp = inp;
oid->index.len = 5;
inaddr = ntohl(inp->xi_inp.inp_laddr.s_addr);
oid->index.subs[0] = (inaddr >> 24) & 0xff;
oid->index.subs[1] = (inaddr >> 16) & 0xff;
oid->index.subs[2] = (inaddr >> 8) & 0xff;
oid->index.subs[3] = (inaddr >> 0) & 0xff;
oid->index.subs[4] = ntohs(inp->xi_inp.inp_lport);
oid++;
}
qsort(udpoids, udp_total, sizeof(udpoids[0]), udp_compare);
return (0);
}
int
op_udp(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int iidx __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 (udp_tick < this_tick)
if (fetch_udp() == -1)
return (SNMP_ERR_GENERR);
switch (value->var.subs[sub - 1]) {
case LEAF_udpInDatagrams:
value->v.uint32 = udpstat.udps_ipackets;
break;
case LEAF_udpNoPorts:
value->v.uint32 = udpstat.udps_noport +
udpstat.udps_noportbcast +
udpstat.udps_noportmcast;
break;
case LEAF_udpInErrors:
value->v.uint32 = udpstat.udps_hdrops +
udpstat.udps_badsum +
udpstat.udps_badlen +
udpstat.udps_fullsock;
break;
case LEAF_udpOutDatagrams:
value->v.uint32 = udpstat.udps_opackets;
break;
}
return (SNMP_ERR_NOERROR);
}
int
op_udptable(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
u_int i;
if (udp_tick < this_tick)
if (fetch_udp() == -1)
return (SNMP_ERR_GENERR);
switch (op) {
case SNMP_OP_GETNEXT:
for (i = 0; i < udp_total; i++)
if (index_compare(&value->var, sub, &udpoids[i].index) < 0)
break;
if (i == udp_total)
return (SNMP_ERR_NOSUCHNAME);
index_append(&value->var, sub, &udpoids[i].index);
break;
case SNMP_OP_GET:
for (i = 0; i < udp_total; i++)
if (index_compare(&value->var, sub, &udpoids[i].index) == 0)
break;
if (i == udp_total)
return (SNMP_ERR_NOSUCHNAME);
break;
case SNMP_OP_SET:
return (SNMP_ERR_NOT_WRITEABLE);
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
default:
abort();
}
switch (value->var.subs[sub - 1]) {
case LEAF_udpLocalAddress:
value->v.ipaddress[0] = udpoids[i].index.subs[0];
value->v.ipaddress[1] = udpoids[i].index.subs[1];
value->v.ipaddress[2] = udpoids[i].index.subs[2];
value->v.ipaddress[3] = udpoids[i].index.subs[3];
break;
case LEAF_udpLocalPort:
value->v.integer = udpoids[i].index.subs[4];
break;
}
return (SNMP_ERR_NOERROR);
}