/* $OpenBSD: if.c,v 1.42 2005/03/13 16:05:50 mpf Exp $ */
/* $NetBSD: if.c,v 1.16.4.2 1996/06/07 21:46:46 thorpej Exp $ */
/*
* Copyright (c) 1983, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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.
*/
#ifdef INHERITED_CODE
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94";
#else
static char *rcsid = "$OpenBSD: if.c,v 1.42 2005/03/13 16:05:50 mpf Exp $";
#endif
#endif /* not lint */
#endif
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifndef _XOPEN_SOURCE
#define _XOPEN_SOURCE 1
#endif
#ifndef _XOPEN_SOURCE_EXTENDED
#define _XOPEN_SOURCE_EXTENDED 1
#endif
#include <signal.h>
#include "main.h"
#include "netstat.h"
#define YES 1
#define NO 0
static void sidewaysintpr(u_int);
static void timerSet(int interval_seconds);
static void timerPause(void);
struct _if_info {
char name[128];
char descr[128];
char ip[128], route[128];
int mtu;
int drops;
unsigned int ifindex;
/*
* Save "expandable" fields as string values
* rather than integer statistics
*/
char s_ipkts[20], s_ierrs[20];
char s_opkts[20], s_oerrs[20];
char s_ibytes[20], s_obytes[20];
char s_outq[20];
unsigned long ipkts, opkts; /* Need to combine 2 MIB values */
int operstatus;
/*
u_long netmask;
struct in_addr ifip, ifroute;
*/
struct _if_info *next;
};
/*
* Retrieve the interface addressing information
* XXX - This could also be extended to handle non-IP interfaces
*/
void
_set_address( struct _if_info *cur_if )
{
oid ipaddr_oid[] = { 1,3,6,1,2,1,4,20,1,0 };
size_t ipaddr_len = OID_LENGTH( ipaddr_oid );
static netsnmp_variable_list *addr_if_var =NULL;
static netsnmp_variable_list *addr_mask_var=NULL;
netsnmp_variable_list *vp, *vp2;
union {
in_addr_t addr;
char data[4];
} tmpAddr;
char *cp;
in_addr_t ifAddr, mask;
/*
* Note that this information only needs to be retrieved
* once, and can be re-used for subsequent calls.
*/
if ( addr_if_var == NULL ) {
ipaddr_oid[ 9 ] = 2; /* ipAdEntIfIndex */
snmp_varlist_add_variable( &addr_if_var, ipaddr_oid, ipaddr_len,
ASN_NULL, NULL, 0);
netsnmp_query_walk( addr_if_var, ss );
ipaddr_oid[ 9 ] = 3; /* ipAdEntNetMask */
snmp_varlist_add_variable( &addr_mask_var, ipaddr_oid, ipaddr_len,
ASN_NULL, NULL, 0);
netsnmp_query_walk( addr_mask_var, ss );
}
/*
* Find the address row relevant to this interface
*/
for (vp=addr_if_var, vp2=addr_mask_var; vp;
vp=vp->next_variable, vp2=vp2->next_variable) {
if ( vp->val.integer && *vp->val.integer == (int)cur_if->ifindex )
break;
}
if (vp2) {
/*
* Always want a numeric interface IP address
*/
snprintf( cur_if->ip, 128, "%" NETSNMP_PRIo "u.%" NETSNMP_PRIo "u."
"%" NETSNMP_PRIo "u.%" NETSNMP_PRIo "u",
vp2->name[10],
vp2->name[11],
vp2->name[12],
vp2->name[13]);
/*
* But re-use the routing table utilities/code for
* displaying the local network information
*/
cp = tmpAddr.data;
cp[0] = (uint8_t) vp2->name[10];
cp[1] = (uint8_t) vp2->name[11];
cp[2] = (uint8_t) vp2->name[12];
cp[3] = (uint8_t) vp2->name[13];
ifAddr = tmpAddr.addr;
cp = tmpAddr.data;
cp[0] = (uint8_t) vp2->val.string[0];
cp[1] = (uint8_t) vp2->val.string[1];
cp[2] = (uint8_t) vp2->val.string[2];
cp[3] = (uint8_t) vp2->val.string[3];
mask = tmpAddr.addr;
snprintf( cur_if->route, 128, "%s", netname(ifAddr, mask));
}
}
/*
* Print a description of the network interfaces.
*/
void
intpr(int interval)
{
oid ifcol_oid[] = { 1,3,6,1,2,1,2,2,1,0 };
size_t ifcol_len = OID_LENGTH( ifcol_oid );
oid ifxcol_oid[] = { 1,3,6,1,2,1,31,1,1,1,0 };
size_t ifxcol_len = OID_LENGTH( ifxcol_oid );
struct _if_info *if_head, *if_tail, *cur_if;
netsnmp_variable_list *var, *vp;
/*
* Track maximum field widths, expanding as necessary
* This is one reason why results can't be
* displayed immediately they are retrieved.
*/
int max_name = 4, max_ip = 7, max_route = 7, max_outq = 5;
int max_ipkts = 5, max_ierrs = 5, max_opkts = 5, max_oerrs = 5;
int max_ibytes = 6, max_obytes = 6;
int i;
if (interval) {
sidewaysintpr((unsigned)interval);
return;
}
/*
* The traditional "netstat -i" output combines information
* from two SNMP tables:
* ipAddrTable (for the IP address/network)
* ifTable (for the interface statistics)
*
* The previous approach was to retrieve (and save) the
* address information first. Then walk the main ifTable,
* add the relevant stored addresses, and saving the
* full information for each interface, before displaying
* the results as a separate pass.
*
* This code reverses this general structure, by first retrieving
* (and storing) the interface statistics for the whole table,
* then inserting the address information obtained from the
* ipAddrTable, and finally displaying the results.
* Such an arrangement should make it easier to extend this
* to handle non-IP interfaces (hence not in ipAddrTable)
*/
if_head = NULL;
if_tail = NULL;
var = NULL;
#define ADD_IFVAR( x ) ifcol_oid[ ifcol_len-1 ] = x; \
snmp_varlist_add_variable( &var, ifcol_oid, ifcol_len, ASN_NULL, NULL, 0)
ADD_IFVAR( 2 ); /* ifName */
ADD_IFVAR( 4 ); /* ifMtu */
ADD_IFVAR( 8 ); /* ifOperStatus */
/*
* The Net/Open-BSD behaviour is to display *either* byte
* counts *or* packet/error counts (but not both). FreeBSD
* integrates the byte counts into the traditional display.
*
* The previous 'snmpnetstat' implementation followed the
* separatist model. This re-write offers an opportunity
* to adopt the (more useful, IMO) Free-BSD approach.
*
* Or we could perhaps support both styles? :-)
*/
if (bflag || oflag) {
ADD_IFVAR( 10 ); /* ifInOctets */
ADD_IFVAR( 16 ); /* ifOutOctets */
}
if (!oflag) {
ADD_IFVAR( 11 ); /* ifInUcastPkts */
ADD_IFVAR( 12 ); /* ifInNUcastPkts */
ADD_IFVAR( 14 ); /* ifInErrors */
ADD_IFVAR( 17 ); /* ifOutUcastPkts */
ADD_IFVAR( 18 ); /* ifOutNUcastPkts */
ADD_IFVAR( 20 ); /* ifOutErrors */
ADD_IFVAR( 21 ); /* ifOutQLen */
}
#if 0
if (tflag) {
ADD_IFVAR( XX ); /* ??? */
}
#endif
if (dflag) {
ADD_IFVAR( 19 ); /* ifOutDiscards */
}
#undef ADD_IFVAR
#define ADD_IFXVAR( x ) ifxcol_oid[ ifxcol_len-1 ] = x; \
snmp_varlist_add_variable( &var, ifxcol_oid, ifxcol_len, ASN_NULL, NULL, 0)
ADD_IFXVAR(1); /* ifName */
#undef ADD_IFXVAR
/*
* Now walk the ifTable, creating a list of interfaces
*/
while ( 1 ) {
if (netsnmp_query_getnext( var, ss ) != SNMP_ERR_NOERROR)
break;
if ((var->type & 0xF0) == 0x80) /* Exception */
break;
ifcol_oid[ ifcol_len-1 ] = 2; /* ifDescr */
if ( snmp_oid_compare( ifcol_oid, ifcol_len,
var->name, ifcol_len) != 0 )
break; /* End of Table */
cur_if = SNMP_MALLOC_TYPEDEF( struct _if_info );
if (!cur_if)
break;
cur_if->ifindex = var->name[ var->name_length-1 ];
for ( vp=var; vp; vp=vp->next_variable ) {
if ((vp->type & 0xF0) == 0x80) /* Exception */
continue;
if ( ! vp->val.integer )
continue;
if ( var->name[ var->name_length-1 ] != cur_if->ifindex ) {
/*
* Inconsistent index information
* XXX - Try to recover ?
*/
SNMP_FREE( cur_if );
break; /* not for now, no */
}
switch ( vp->name[ var->name_length-2 ] ) {
case 2: /* ifDescr */
if (vp->val_len >= sizeof(cur_if->name))
vp->val_len = sizeof(cur_if->name)-1;
memmove( cur_if->name, vp->val.string, vp->val_len );
cur_if->name[vp->val_len] = 0;
memmove( cur_if->descr, vp->val.string, vp->val_len );
cur_if->descr[vp->val_len] = 0;
break;
case 4: /* ifMtu */
cur_if->mtu = *vp->val.integer;
break;
case 8: /* ifOperStatus */
cur_if->operstatus = *vp->val.integer;
/* XXX - any special processing ?? */
break;
case 10: /* ifInOctets */
sprintf(cur_if->s_ibytes, "%lu", *vp->val.integer);
i = strlen(cur_if->s_ibytes);
if (i > max_ibytes)
max_ibytes = i;
break;
case 11: /* ifInUcastPkts */
cur_if->ipkts += *vp->val.integer;
sprintf(cur_if->s_ipkts, "%lu", cur_if->ipkts);
i = strlen(cur_if->s_ipkts);
if (i > max_ipkts)
max_ipkts = i;
break;
case 12: /* ifInNUcastPkts */
cur_if->ipkts += *vp->val.integer;
sprintf(cur_if->s_ipkts, "%lu", cur_if->ipkts);
i = strlen(cur_if->s_ipkts);
if (i > max_ipkts)
max_ipkts = i;
break;
case 14: /* ifInErrors */
sprintf(cur_if->s_ierrs, "%lu", *vp->val.integer);
i = strlen(cur_if->s_ierrs);
if (i > max_ierrs)
max_ierrs = i;
break;
case 16: /* ifOutOctets */
sprintf(cur_if->s_obytes, "%lu", *vp->val.integer);
i = strlen(cur_if->s_obytes);
if (i > max_obytes)
max_obytes = i;
break;
case 17: /* ifOutUcastPkts */
cur_if->opkts += *vp->val.integer;
sprintf(cur_if->s_opkts, "%lu", cur_if->opkts);
i = strlen(cur_if->s_opkts);
if (i > max_opkts)
max_opkts = i;
break;
case 18: /* ifOutNUcastPkts */
cur_if->opkts += *vp->val.integer;
sprintf(cur_if->s_opkts, "%lu", cur_if->opkts);
i = strlen(cur_if->s_opkts);
if (i > max_opkts)
max_opkts = i;
break;
case 19: /* ifOutDiscards */
cur_if->drops = *vp->val.integer;
break;
case 20: /* ifOutErrors */
sprintf(cur_if->s_oerrs, "%lu", *vp->val.integer);
i = strlen(cur_if->s_oerrs);
if (i > max_oerrs)
max_oerrs = i;
break;
case 21: /* ifOutQLen */
sprintf(cur_if->s_outq, "%lu", *vp->val.integer);
i = strlen(cur_if->s_outq);
if (i > max_outq)
max_outq = i;
break;
case 1: /* ifName */
if (vp->val_len >= sizeof(cur_if->name))
vp->val_len = sizeof(cur_if->name)-1;
memmove( cur_if->name, vp->val.string, vp->val_len );
cur_if->name[vp->val_len] = 0;
if ((i = strlen(cur_if->name) + 1) > max_name)
max_name = i;
break;
}
}
/*
* XXX - Perhaps query ifXTable for additional info ??
* (ifName/ifAlias, or HC counters)
*/
/*
* If we're to monitor a particular interface, then
* ignore all others. It would be more efficient
* to check this earlier (as part of processing
* the varbind list). But performing this test here
* means we can recognise ifXTable names as well)
*/
if ( intrface && strcmp( cur_if->name, intrface) != 0 && strcmp( cur_if->descr, intrface) != 0) {
SNMP_FREE( cur_if );
}
/*
* Insert the IP address and network settings, and
* add the new _if_stat structure to the list.
*/
if ( cur_if ) {
if ((i = strlen(cur_if->name) + 1) > max_name)
max_name = i;
_set_address( cur_if );
i = strlen(cur_if->ip);
if (i > max_ip)
max_ip = i;
i = strlen(cur_if->route);
if (i > max_route)
max_route = i;
if ( if_tail ) {
if_tail->next = cur_if;
if_tail = cur_if;
} else {
if_head = cur_if;
if_tail = cur_if;
}
}
} /* while (1) */
snmp_free_varbind(var);
/*
* Now display the specified results (in Free-BSD format)
* setting the field widths appropriately....
*/
printf("%*.*s %5.5s %*.*s %*.*s",
-max_name, max_name, "Name", "Mtu",
-max_route, max_route, "Network",
-max_ip, max_ip, "Address");
if (oflag) {
printf(" %*s %*s", max_ibytes, "Ibytes",
max_obytes, "Obytes");
} else {
printf(" %*s %*s", max_ipkts, "Ipkts",
max_ierrs, "Ierrs");
if (bflag)
printf(" %*s", max_ibytes, "Ibytes");
printf(" %*s %*s", max_opkts, "Opkts",
max_oerrs, "Oerrs");
if (bflag)
printf(" %*s", max_obytes, "Obytes");
printf(" %*s", max_outq, "Queue");
}
/* if (tflag)
printf(" %s", "Time");
*/
if (dflag)
printf(" %s", "Drop");
putchar('\n');
for (cur_if = if_head; cur_if; cur_if=cur_if->next) {
if (cur_if->name[0] == 0)
continue;
printf( "%*.*s %5d", -max_name, max_name, cur_if->name, cur_if->mtu);
printf(" %*.*s", -max_route, max_route, cur_if->route);
printf(" %*.*s", -max_ip, max_ip, cur_if->ip);
if (oflag) {
printf(" %*s %*s", max_ibytes, cur_if->s_ibytes,
max_obytes, cur_if->s_obytes);
} else {
printf(" %*s %*s", max_ipkts, cur_if->s_ipkts,
max_ierrs, cur_if->s_ierrs);
if (bflag)
printf(" %*s", max_ibytes, cur_if->s_ibytes);
printf(" %*s %*s", max_opkts, cur_if->s_opkts,
max_oerrs, cur_if->s_oerrs);
if (bflag)
printf(" %*s", max_obytes, cur_if->s_obytes);
printf(" %*s", max_outq, cur_if->s_outq);
}
/* if (tflag)
printf(" %4d", cur_if->???);
*/
if (dflag)
printf(" %4d", cur_if->drops);
putchar('\n');
}
/*
* ... and tidy up.
*/
for (cur_if = if_head; cur_if; cur_if=if_head) {
if_head=cur_if->next;
cur_if->next = NULL;
SNMP_FREE( cur_if );
}
}
#define MAXIF 100
struct iftot {
char ift_name[128]; /* interface name */
int ifIndex;
u_long ift_ip; /* input packets */
u_long ift_ib; /* input bytes */
u_long ift_ie; /* input errors */
u_long ift_op; /* output packets */
u_long ift_ob; /* output bytes */
u_long ift_oe; /* output errors */
u_long ift_co; /* collisions */
u_long ift_dr; /* drops */
};
int signalled; /* set if alarm goes off "early" */
/*
* Print a running summary of interface statistics.
* Repeat display every interval seconds, showing statistics
* collected over that interval. Assumes that interval is non-zero.
* First line printed at top of screen is always cumulative.
*/
static void
sidewaysintpr(unsigned int interval)
{
/*
* As with the "one-shot" interface display, there are
* two different possible output formats. The Net/
* Open-BSD style displays both information about a
* single interface *and* the overall totals.
* The equivalent Free-BSD approach is to report on one
* or the other (rather than both). This is probably
* more useful (IMO), and significantly more efficient.
* So that's the style implemented here.
*
* Note that the 'ifcol' OID buffer can represent a full
* instance (including ifIndex), rather than just a
* column object OID, as with the one-shot code.
*/
oid ifcol_oid[] = { 1,3,6,1,2,1,2,2,1,0,0 };
size_t ifcol_len = OID_LENGTH( ifcol_oid );
netsnmp_variable_list *var, *vp;
struct iftot *ip = NULL, *cur_if = NULL; /* single I/F display */
struct iftot *sum = NULL, *total = NULL; /* overall summary */
int line;
int first;
size_t i;
var = NULL;
if ( intrface ) {
/*
* Locate the ifIndex of the interface to monitor,
* by walking the ifDescr column of the ifTable
*/
ifcol_oid[ ifcol_len-2 ] = 2; /* ifDescr */
snmp_varlist_add_variable( &var, ifcol_oid, ifcol_len-1,
ASN_NULL, NULL, 0);
i = strlen(intrface);
netsnmp_query_walk( var, ss );
for (vp=var; vp; vp=vp->next_variable) {
if (strncmp(intrface, (char *)vp->val.string, i) == 0 &&
i == vp->val_len)
break; /* found requested interface */
}
/*
* XXX - Might be worth searching ifName/ifAlias as well
*/
if (!vp) {
oid ifname_oid[] = { 1,3,6,1,2,1,31,1,1,1,1,0 };
size_t ifname_len = OID_LENGTH( ifname_oid );
snmp_free_var( var );
var = NULL;
snmp_varlist_add_variable( &var, ifname_oid, ifname_len-1,
ASN_NULL, NULL, 0);
i = strlen(intrface);
netsnmp_query_walk( var, ss );
for (vp=var; vp; vp=vp->next_variable) {
if (strncmp(intrface, (char *)vp->val.string, i) == 0 &&
i == vp->val_len)
break; /* found requested interface */
}
}
if (!vp) {
oid ifalias_oid[] = { 1,3,6,1,2,1,31,1,1,1,18,0 };
size_t ifalias_len = OID_LENGTH( ifalias_oid );
snmp_free_var( var );
var = NULL;
snmp_varlist_add_variable( &var, ifalias_oid, ifalias_len-1,
ASN_NULL, NULL, 0);
i = strlen(intrface);
netsnmp_query_walk( var, ss );
for (vp=var; vp; vp=vp->next_variable) {
if (strncmp(intrface, (char *)vp->val.string, i) == 0 &&
i == vp->val_len)
break; /* found requested interface */
}
}
if (!vp) {
fprintf(stderr, "%s: unknown interface\n", intrface );
exit(1);
}
/*
* Prepare the current and previous 'iftot' structures,
* and set the ifIndex value in the OID buffer.
*/
ip = SNMP_MALLOC_TYPEDEF( struct iftot );
cur_if = SNMP_MALLOC_TYPEDEF( struct iftot );
if (!ip || !cur_if) {
fprintf(stderr, "internal error\n");
exit(1);
}
ifcol_oid[ ifcol_len-1 ] = vp->name[ ifcol_len-1 ];
snmp_free_var( var );
var = NULL;
} else {
/*
* Prepare the current and previous 'iftot' structures.
* (using different pointers, for consistency with *BSD code)
*/
sum = SNMP_MALLOC_TYPEDEF( struct iftot );
total = SNMP_MALLOC_TYPEDEF( struct iftot );
if (!sum || !total) {
fprintf(stderr, "internal error\n");
exit(1);
}
}
timerSet( interval );
first = 1;
banner:
printf( "%17s %14s %16s", "input",
intrface ? intrface : "(Total)", "output");
putchar('\n');
printf( "%10s %5s %10s %10s %5s %10s %5s",
"packets", "errs", "bytes", "packets", "errs", "bytes", "colls");
if (dflag)
printf(" %5.5s", "drops");
putchar('\n');
fflush(stdout);
line = 0;
loop:
if ( intrface ) {
#define ADD_IFVAR( x ) ifcol_oid[ ifcol_len-2 ] = x; \
snmp_varlist_add_variable( &var, ifcol_oid, ifcol_len, ASN_NULL, NULL, 0)
/* if (bflag) { */
ADD_IFVAR( 10 ); /* ifInOctets */
ADD_IFVAR( 16 ); /* ifOutOctets */
/* } */
ADD_IFVAR( 11 ); /* ifInUcastPkts */
ADD_IFVAR( 12 ); /* ifInNUcastPkts */
ADD_IFVAR( 14 ); /* ifInErrors */
ADD_IFVAR( 17 ); /* ifOutUcastPkts */
ADD_IFVAR( 18 ); /* ifOutNUcastPkts */
ADD_IFVAR( 20 ); /* ifOutErrors */
ADD_IFVAR( 21 ); /* ifOutQLen */
if (dflag) {
ADD_IFVAR( 19 ); /* ifOutDiscards */
}
#undef ADD_IFVAR
netsnmp_query_get( var, ss ); /* Or parallel walk ?? */
cur_if->ift_ip = 0;
cur_if->ift_ib = 0;
cur_if->ift_ie = 0;
cur_if->ift_op = 0;
cur_if->ift_ob = 0;
cur_if->ift_oe = 0;
cur_if->ift_co = 0;
cur_if->ift_dr = 0;
cur_if->ifIndex = var->name[ ifcol_len-1 ];
for (vp=var; vp; vp=vp->next_variable) {
if ((var->type & 0xF0) == 0x80) /* Exception */
continue;
if ( ! vp->val.integer )
continue;
switch (vp->name[ifcol_len-2]) {
case 10: /* ifInOctets */
cur_if->ift_ib = *vp->val.integer;
break;
case 11: /* ifInUcastPkts */
cur_if->ift_ip += *vp->val.integer;
break;
case 12: /* ifInNUcastPkts */
cur_if->ift_ip += *vp->val.integer;
break;
case 14: /* ifInErrors */
cur_if->ift_ie = *vp->val.integer;
break;
case 16: /* ifOutOctets */
cur_if->ift_ob = *vp->val.integer;
break;
case 17: /* ifOutUcastPkts */
cur_if->ift_op += *vp->val.integer;
break;
case 18: /* ifOutNUcastPkts */
cur_if->ift_op += *vp->val.integer;
break;
case 19: /* ifOutDiscards */
cur_if->ift_dr = *vp->val.integer;
break;
case 20: /* ifOutErrors */
cur_if->ift_oe = *vp->val.integer;
break;
case 21: /* ifOutQLen */
cur_if->ift_co = *vp->val.integer;
break;
}
}
snmp_free_varbind( var );
var = NULL;
if (!first) {
printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
cur_if->ift_ip - ip->ift_ip,
cur_if->ift_ie - ip->ift_ie,
cur_if->ift_ib - ip->ift_ib,
cur_if->ift_op - ip->ift_op,
cur_if->ift_oe - ip->ift_oe,
cur_if->ift_ob - ip->ift_ob,
cur_if->ift_co - ip->ift_co);
if (dflag)
printf(" %5lu", cur_if->ift_dr - ip->ift_dr);
putchar('\n');
fflush(stdout);
}
ip->ift_ip = cur_if->ift_ip;
ip->ift_ie = cur_if->ift_ie;
ip->ift_ib = cur_if->ift_ib;
ip->ift_op = cur_if->ift_op;
ip->ift_oe = cur_if->ift_oe;
ip->ift_ob = cur_if->ift_ob;
ip->ift_co = cur_if->ift_co;
ip->ift_dr = cur_if->ift_dr;
} /* (single) interface */
else {
sum->ift_ip = 0;
sum->ift_ib = 0;
sum->ift_ie = 0;
sum->ift_op = 0;
sum->ift_ob = 0;
sum->ift_oe = 0;
sum->ift_co = 0;
sum->ift_dr = 0;
#define ADD_IFVAR( x ) ifcol_oid[ ifcol_len-2 ] = x; \
snmp_varlist_add_variable( &var, ifcol_oid, ifcol_len-1, ASN_NULL, NULL, 0)
ADD_IFVAR( 11 ); /* ifInUcastPkts */
ADD_IFVAR( 12 ); /* ifInNUcastPkts */
ADD_IFVAR( 14 ); /* ifInErrors */
ADD_IFVAR( 17 ); /* ifOutUcastPkts */
ADD_IFVAR( 18 ); /* ifOutNUcastPkts */
ADD_IFVAR( 20 ); /* ifOutErrors */
ADD_IFVAR( 21 ); /* ifOutQLen */
/* if (bflag) { */
ADD_IFVAR( 10 ); /* ifInOctets */
ADD_IFVAR( 16 ); /* ifOutOctets */
/* } */
if (dflag) {
ADD_IFVAR( 19 ); /* ifOutDiscards */
}
#undef ADD_IFVAR
ifcol_oid[ ifcol_len-2 ] = 11; /* ifInUcastPkts */
while ( 1 ) {
if (netsnmp_query_getnext( var, ss ) != SNMP_ERR_NOERROR)
break;
if ((var->type & 0xF0) == 0x80) /* Exception */
break;
if ( snmp_oid_compare( ifcol_oid, ifcol_len-2,
var->name, ifcol_len-2) != 0 )
break; /* End of Table */
for ( vp=var; vp; vp=vp->next_variable ) {
if ((vp->type & 0xF0) == 0x80) /* Exception */
continue;
if ( ! vp->val.integer )
continue;
switch ( vp->name[ ifcol_len-2 ] ) {
case 10: /* ifInOctets */
sum->ift_ib += *vp->val.integer;
break;
case 11: /* ifInUcastPkts */
sum->ift_ip += *vp->val.integer;
break;
case 12: /* ifInNUcastPkts */
sum->ift_ip += *vp->val.integer;
break;
case 14: /* ifInErrors */
sum->ift_ie += *vp->val.integer;
break;
case 16: /* ifOutOctets */
sum->ift_ob += *vp->val.integer;
break;
case 17: /* ifOutUcastPkts */
sum->ift_op += *vp->val.integer;
break;
case 18: /* ifOutNUcastPkts */
sum->ift_op += *vp->val.integer;
break;
case 19: /* ifOutDiscards */
sum->ift_dr += *vp->val.integer;
break;
case 20: /* ifOutErrors */
sum->ift_oe += *vp->val.integer;
break;
case 21: /* ifOutQLen */
sum->ift_co += *vp->val.integer;
break;
}
}
/*
* Now loop to retrieve the next entry from the table.
*/
} /* while (1) */
snmp_free_varbind( var );
var = NULL;
if (!first) {
printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
sum->ift_ip - total->ift_ip,
sum->ift_ie - total->ift_ie,
sum->ift_ib - total->ift_ib,
sum->ift_op - total->ift_op,
sum->ift_oe - total->ift_oe,
sum->ift_ob - total->ift_ob,
sum->ift_co - total->ift_co);
if (dflag)
printf(" %5lu", sum->ift_dr - total->ift_dr);
putchar('\n');
fflush(stdout);
}
total->ift_ip = sum->ift_ip;
total->ift_ie = sum->ift_ie;
total->ift_ib = sum->ift_ib;
total->ift_op = sum->ift_op;
total->ift_oe = sum->ift_oe;
total->ift_ob = sum->ift_ob;
total->ift_co = sum->ift_co;
total->ift_dr = sum->ift_dr;
} /* overall summary */
timerPause();
timerSet(interval);
line++;
first = 0;
if (line == 21)
goto banner;
else
goto loop;
/*NOTREACHED*/
}
/*
* timerSet sets or resets the timer to fire in "interval" seconds.
* timerPause waits only if the timer has not fired.
* timing precision is not considered important.
*/
#if (defined(WIN32) || defined(cygwin))
static int sav_int;
static time_t timezup;
static void
timerSet(int interval_seconds)
{
sav_int = interval_seconds;
timezup = time(0) + interval_seconds;
}
/*
* you can do better than this !
*/
static void
timerPause(void)
{
time_t now;
while (time(&now) < timezup)
#ifdef WIN32
Sleep(400);
#else
{
struct timeval tx;
tx.tv_sec = 0;
tx.tv_usec = 400 * 1000; /* 400 milliseconds */
select(0, 0, 0, 0, &tx);
}
#endif
}
#else
/*
* Called if an interval expires before sidewaysintpr has completed a loop.
* Sets a flag to not wait for the alarm.
*/
RETSIGTYPE
catchalarm(int sig)
{
signalled = YES;
}
static void
timerSet(int interval_seconds)
{
#ifdef HAVE_SIGSET
(void) sigset(SIGALRM, catchalarm);
#else
(void) signal(SIGALRM, catchalarm);
#endif
signalled = NO;
(void) alarm(interval_seconds);
}
static void
timerPause(void)
{
#ifdef HAVE_SIGHOLD
sighold(SIGALRM);
if (!signalled) {
sigpause(SIGALRM);
}
#else
int oldmask;
oldmask = sigblock(sigmask(SIGALRM));
if (!signalled) {
sigpause(0);
}
sigsetmask(oldmask);
#endif
}
#endif /* !WIN32 && !cygwin */