if.c
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上传日期:2007-10-30
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- /* $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
- #define __USE_XOPEN
- #define __USE_XOPEN_EXTENDED
- #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 ip[128], route[128];
- int mtu;
- int drops;
- 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 == cur_if->ifindex )
- break;
- }
- if (vp2) {
- /*
- * Always want a numeric interface IP address
- */
- snprintf( cur_if->ip, 128, "%lu.%lu.%lu.%lu",
- 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] = vp2->name[ 10 ] & 0xff;
- cp[1] = vp2->name[ 11 ] & 0xff;
- cp[2] = vp2->name[ 12 ] & 0xff;
- cp[3] = vp2->name[ 13 ] & 0xff;
- ifAddr = tmpAddr.addr;
- cp = tmpAddr.data;
- cp[0] = vp2->val.string[ 0 ] & 0xff;
- cp[1] = vp2->val.string[ 1 ] & 0xff;
- cp[2] = vp2->val.string[ 2 ] & 0xff;
- cp[3] = vp2->val.string[ 3 ] & 0xff;
- 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 );
- 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 (tflag) {
- ADD_IFVAR( XX ); // ???
- }
- */
- if (dflag) {
- ADD_IFVAR( 19 ); /* ifOutDiscards */
- }
- #undef ADD_IFVAR
- /*
- * Now walk the ifTable, creating a list of interfaces
- */
- while ( 1 ) {
- if (netsnmp_query_getnext( var, ss ) != SNMP_ERR_NOERROR)
- 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 ( var->name[ var->name_length-1 ] != cur_if->ifindex ) {
- /*
- * Inconsistent index information
- * XXX - Try to recover ?
- */
- SNMP_FREE( cur_if );
- cur_if = NULL;
- 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;
- if ((i = strlen(cur_if->name) + 1) > max_name)
- max_name = i;
- 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;
- }
- }
- /*
- * 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) {
- SNMP_FREE( cur_if );
- cur_if = NULL;
- }
- /*
- * Insert the IP address and network settings, and
- * add the new _if_stat structure to the list.
- */
- if ( cur_if ) {
- _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) */
- /*
- * 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;
- int 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) {
- fprintf(stderr, "%s: unknown interfacen", 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 errorn");
- 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 errorn");
- 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) {
- 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 ( 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 ) {
- 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 */