/* $OpenBSD: route.c,v 1.66 2004/11/17 01:47:20 itojun Exp $ */
/* $NetBSD: route.c,v 1.15 1996/05/07 02:55:06 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: @(#)route.c 8.3 (Berkeley) 3/9/94";
#else
static char *rcsid = "$OpenBSD: route.c,v 1.66 2004/11/17 01:47:20 itojun Exp $";
#endif
#endif /* not lint */
#endif
#include <net-snmp/net-snmp-config.h>
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include <net-snmp/net-snmp-includes.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_NETDB_H
#include <netdb.h>
#endif
#ifndef INET
#define INET
#endif
#include "main.h"
#include "netstat.h"
#include "ffs.h"
#if HAVE_WINSOCK_H
#include "winstub.h"
#endif
#define SET_MASK 0x01
#define SET_GWAY 0x02
#define SET_IFNO 0x04
#define SET_TYPE 0x08
#define SET_PRTO 0x10
#define SET_ALL 0x1f
struct route_entry {
in_addr_t destination;
in_addr_t mask;
in_addr_t gateway;
int ifNumber;
int type;
int proto;
int af;
int set_bits;
char ifname[64];
};
void p_rtnode( struct route_entry *rp );
/*
* Print routing tables.
*/
void
routepr(void)
{
struct route_entry route, *rp = &route;
oid rtcol_oid[] = { 1,3,6,1,2,1,4,21,1,0 };
size_t rtcol_len = OID_LENGTH( rtcol_oid );
union {
in_addr_t addr;
char data[4];
} tmpAddr;
netsnmp_variable_list *var=NULL, *vp;
char *cp;
printf("Routing tables (ipRouteTable)\n");
pr_rthdr(AF_INET);
#define ADD_RTVAR( x ) rtcol_oid[ rtcol_len-1 ] = x; \
snmp_varlist_add_variable( &var, rtcol_oid, rtcol_len, ASN_NULL, NULL, 0)
ADD_RTVAR( 2 ); /* ipRouteIfIndex */
ADD_RTVAR( 7 ); /* ipRouteNextHop */
ADD_RTVAR( 8 ); /* ipRouteType */
ADD_RTVAR( 9 ); /* ipRouteProto */
ADD_RTVAR( 11 ); /* ipRouteMask */
#undef ADD_RTVAR
/*
* Now walk the ipRouteTable, reporting the various route entries
*/
while ( 1 ) {
if (netsnmp_query_getnext( var, ss ) != SNMP_ERR_NOERROR)
break;
rtcol_oid[ rtcol_len-1 ] = 2; /* ifRouteIfIndex */
if ( snmp_oid_compare( rtcol_oid, rtcol_len,
var->name, rtcol_len) != 0 )
break; /* End of Table */
if (var->type == SNMP_NOSUCHOBJECT ||
var->type == SNMP_NOSUCHINSTANCE ||
var->type == SNMP_ENDOFMIBVIEW)
break;
memset( &route, 0, sizeof( struct route_entry ));
/* Extract ipRouteDest index value */
cp = tmpAddr.data;
cp[0] = var->name[ 10 ] & 0xff;
cp[1] = var->name[ 11 ] & 0xff;
cp[2] = var->name[ 12 ] & 0xff;
cp[3] = var->name[ 13 ] & 0xff;
rp->destination = tmpAddr.addr;
for ( vp=var; vp; vp=vp->next_variable ) {
switch ( vp->name[ 9 ] ) {
case 2: /* ifRouteIfIndex */
rp->ifNumber = *vp->val.integer;
rp->set_bits |= SET_IFNO;
break;
case 7: /* ipRouteNextHop */
memmove(&rp->gateway, vp->val.string, 4);
rp->set_bits |= SET_GWAY;
break;
case 8: /* ipRouteType */
rp->type = *vp->val.integer;
rp->set_bits |= SET_TYPE;
break;
case 9: /* ipRouteProto */
rp->proto = *vp->val.integer;
rp->set_bits |= SET_PRTO;
break;
case 11: /* ipRouteMask */
memmove(&rp->mask, vp->val.string, 4);
rp->set_bits |= SET_MASK;
break;
}
}
if (rp->set_bits != SET_ALL) {
continue; /* Incomplete query */
}
p_rtnode( rp );
}
}
int
route4pr(int af)
{
struct route_entry route, *rp = &route;
oid rtcol_oid[] = { 1,3,6,1,2,1,4,24,4,1,0 }; /* ipCidrRouteEntry */
size_t rtcol_len = OID_LENGTH( rtcol_oid );
netsnmp_variable_list *var = NULL, *vp;
union {
in_addr_t addr;
unsigned char data[4];
} tmpAddr;
int printed = 0;
int hdr_af = AF_UNSPEC;
if (af != AF_UNSPEC && af != AF_INET)
return 0;
#define ADD_RTVAR( x ) rtcol_oid[ rtcol_len-1 ] = x; \
snmp_varlist_add_variable( &var, rtcol_oid, rtcol_len, ASN_NULL, NULL, 0)
ADD_RTVAR( 5 ); /* ipCidrRouteIfIndex */
ADD_RTVAR( 6 ); /* ipCidrRouteType */
ADD_RTVAR( 7 ); /* ipCidrRouteProto */
#undef ADD_RTVAR
/*
* Now walk the ipCidrRouteTable, reporting the various route entries
*/
while ( 1 ) {
oid *op;
unsigned char *cp;
if (netsnmp_query_getnext( var, ss ) != SNMP_ERR_NOERROR)
break;
rtcol_oid[ rtcol_len-1 ] = 5; /* ipRouteIfIndex */
if ( snmp_oid_compare( rtcol_oid, rtcol_len,
var->name, rtcol_len) != 0 )
break; /* End of Table */
if (var->type == SNMP_NOSUCHOBJECT ||
var->type == SNMP_NOSUCHINSTANCE ||
var->type == SNMP_ENDOFMIBVIEW)
break;
memset( &route, 0, sizeof( struct route_entry ));
rp->af = AF_INET;
op = var->name+rtcol_len;
cp = tmpAddr.data;
cp[0] = *op++ & 0xff;
cp[1] = *op++ & 0xff;
cp[2] = *op++ & 0xff;
cp[3] = *op++ & 0xff;
rp->destination = tmpAddr.addr;
cp = tmpAddr.data;
cp[0] = *op++ & 0xff;
cp[1] = *op++ & 0xff;
cp[2] = *op++ & 0xff;
cp[3] = *op++ & 0xff;
rp->mask = tmpAddr.addr;
op++; /* ipCidrRouteTos */
cp = tmpAddr.data;
cp[0] = *op++ & 0xff;
cp[1] = *op++ & 0xff;
cp[2] = *op++ & 0xff;
cp[3] = *op++ & 0xff;
rp->gateway = tmpAddr.addr;
rp->set_bits = SET_MASK | SET_GWAY;
for ( vp=var; vp; vp=vp->next_variable ) {
switch ( vp->name[ rtcol_len - 1 ] ) {
case 5: /* ipCidrRouteIfIndex */
rp->ifNumber = *vp->val.integer;
rp->set_bits |= SET_IFNO;
break;
case 6: /* ipCidrRouteType */
rp->type = *vp->val.integer;
rp->set_bits |= SET_TYPE;
break;
case 7: /* ipCidrRouteProto */
rp->proto = *vp->val.integer;
rp->set_bits |= SET_PRTO;
break;
}
}
if (rp->set_bits != SET_ALL) {
continue; /* Incomplete query */
}
if (hdr_af != rp->af) {
if (hdr_af != AF_UNSPEC)
printf("\n");
hdr_af = rp->af;
printf("Routing tables (ipCidrRouteTable)\n");
pr_rthdr(hdr_af);
}
p_rtnode( rp );
printed++;
}
snmp_free_varbind(var);
return printed;
}
struct iflist {
int index;
char name[64];
struct iflist *next;
} *Iflist = NULL;
void
get_ifname(char *name, int ifIndex)
{
oid ifdescr_oid[] = { 1,3,6,1,2,1,2,2,1,2,0 };
size_t ifdescr_len = OID_LENGTH( ifdescr_oid );
oid ifxcol_oid[] = { 1,3,6,1,2,1,31,1,1,1,1,0 };
size_t ifxcol_len = OID_LENGTH( ifxcol_oid );
netsnmp_variable_list *var = NULL;
struct iflist *ip;
for (ip = Iflist; ip; ip = ip->next) {
if (ip->index == ifIndex)
break;
}
if (ip) {
strcpy(name, ip->name);
return;
}
ip = (struct iflist *) malloc(sizeof(struct iflist));
if (ip == NULL)
return;
ip->next = Iflist;
Iflist = ip;
ip->index = ifIndex;
ifxcol_oid[ ifxcol_len-1 ] = ifIndex;
snmp_varlist_add_variable( &var, ifxcol_oid, ifxcol_len,
ASN_NULL, NULL, 0);
if (netsnmp_query_get( var, ss ) == SNMP_ERR_NOERROR) {
if (var->val_len >= sizeof(ip->name))
var->val_len = sizeof(ip->name) - 1;
memmove(ip->name, var->val.string, var->val_len);
ip->name[var->val_len] = '\0';
strcpy(name, ip->name);
snmp_free_varbind(var);
return;
}
ifdescr_oid[ ifdescr_len-1 ] = ifIndex;
snmp_varlist_add_variable( &var, ifdescr_oid, ifdescr_len,
ASN_NULL, NULL, 0);
if (netsnmp_query_get( var, ss ) == SNMP_ERR_NOERROR) {
if (var->val_len >= sizeof(ip->name))
var->val_len = sizeof(ip->name) - 1;
memmove(ip->name, var->val.string, var->val_len);
ip->name[var->val_len] = '\0';
snmp_free_varbind(var);
} else {
sprintf(ip->name, "if%d", ifIndex);
}
strcpy(name, ip->name);
}
/* column widths; each followed by one space */
#ifndef NETSNMP_ENABLE_IPV6
#define WID_DST(af) 26 /* width of destination column */
#define WID_GW(af) 18 /* width of gateway column */
#else
/* width of destination/gateway column */
#if 1
/* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 */
#define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 34 : 26) : 26)
#define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)
#else
/* strlen("fe80::aaaa:bbbb:cccc:dddd") == 25, strlen("/128") == 4 */
#define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 29 : 18) : 18)
#define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 25 : 18) : 18)
#endif
#endif /* NETSNMP_ENABLE_IPV6 */
/*
* Print header for routing table columns.
*/
void
pr_rthdr(int af)
{
/*
if (Aflag)
printf("%-*.*s ", PLEN, PLEN, "Address");
if (Sflag)
printf("%-*.*s ",
WID_DST(af), WID_DST(af), "Source");
*/
printf("%-*.*s ",
WID_DST(af), WID_DST(af), "Destination");
printf("%-*.*s %-6.6s %s\n",
WID_GW(af), WID_GW(af), "Gateway",
"Flags", "Interface");
}
/*
* Print header for PF_KEY entries.
void
pr_encaphdr(void)
{
if (Aflag)
printf("%-*s ", PLEN, "Address");
printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
"Source", "Port", "Destination",
"Port", "Proto", "SA(Address/Proto/Type/Direction)");
}
*/
char *
routename(in_addr_t in)
{
char *cp;
static char line[MAXHOSTNAMELEN];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN];
static int first = 1;
if (first) {
first = 0;
if (gethostname(line, sizeof line) == 0 &&
(cp = strchr(line, '.')))
(void) strlcpy(domain, cp + 1, sizeof domain);
else
domain[0] = '\0';
}
cp = NULL;
if (!nflag) {
hp = netsnmp_gethostbyaddr((char *)&in, sizeof (struct in_addr),
AF_INET);
if (hp) {
if ((cp = strchr(hp->h_name, '.')) &&
!strcmp(cp + 1, domain))
*cp = '\0';
cp = hp->h_name;
}
}
if (cp) {
strlcpy(line, cp, sizeof(line));
} else {
#define C(x) (unsigned)((x) & 0xff)
in = ntohl(in);
snprintf(line, sizeof line, "%u.%u.%u.%u",
C(in >> 24), C(in >> 16), C(in >> 8), C(in));
}
return (line);
}
/*
* Return the name of the network whose address is given.
* The address is assumed to be that of a net or subnet, not a host.
*/
char *
netname(in_addr_t in, in_addr_t mask)
{
char *cp = NULL;
static char line[MAXHOSTNAMELEN];
struct netent *np = NULL;
int mbits;
in = ntohl(in);
mask = ntohl(mask);
if (!nflag && in != INADDR_ANY) {
if ((np = getnetbyaddr(in, AF_INET)) != NULL)
cp = np->n_name;
}
mbits = mask ? 33 - _ffs(mask) : 0;
if (cp) {
strlcpy(line, cp, sizeof(line));
} else if (mbits < 9)
snprintf(line, sizeof line, "%u/%d", C(in >> 24), mbits);
else if (mbits < 17)
snprintf(line, sizeof line, "%u.%u/%d",
C(in >> 24) , C(in >> 16), mbits);
else if (mbits < 25)
snprintf(line, sizeof line, "%u.%u.%u/%d",
C(in >> 24), C(in >> 16), C(in >> 8), mbits);
else
snprintf(line, sizeof line, "%u.%u.%u.%u/%d", C(in >> 24),
C(in >> 16), C(in >> 8), C(in), mbits);
return (line);
}
#undef NETSNMP_ENABLE_IPV6
#ifdef NETSNMP_ENABLE_IPV6
char *
netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
{
static char line[MAXHOSTNAMELEN + 1];
struct sockaddr_in6 sin6;
u_char *p;
u_char *lim;
int masklen, final = 0, illegal = 0;
int i;
char hbuf[NI_MAXHOST];
int flag = 0;
int error;
sin6 = *sa6;
masklen = 0;
lim = (u_char *)(mask + 1);
i = 0;
if (mask) {
for (p = (u_char *)mask; p < lim; p++) {
if (final && *p) {
illegal++;
sin6.sin6_addr.s6_addr[i++] = 0x00;
continue;
}
switch (*p & 0xff) {
case 0xff:
masklen += 8;
break;
case 0xfe:
masklen += 7;
final++;
break;
case 0xfc:
masklen += 6;
final++;
break;
case 0xf8:
masklen += 5;
final++;
break;
case 0xf0:
masklen += 4;
final++;
break;
case 0xe0:
masklen += 3;
final++;
break;
case 0xc0:
masklen += 2;
final++;
break;
case 0x80:
masklen += 1;
final++;
break;
case 0x00:
final++;
break;
default:
final++;
illegal++;
break;
}
if (!illegal)
sin6.sin6_addr.s6_addr[i++] &= *p;
else
sin6.sin6_addr.s6_addr[i++] = 0x00;
}
} else
masklen = 128;
if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr))
return("default");
if (illegal)
fprintf(stderr, "illegal prefixlen\n");
if (nflag)
flag |= NI_NUMERICHOST;
error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
hbuf, sizeof(hbuf), NULL, 0, flag);
if (error)
snprintf(hbuf, sizeof(hbuf), "invalid");
snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
return line;
}
char *
routename6(struct sockaddr_in6 *sa6)
{
static char line[NI_MAXHOST];
const int niflag = NI_NUMERICHOST;
if (getnameinfo((struct sockaddr *)sa6, sa6->sin6_len,
line, sizeof(line), NULL, 0, niflag) != 0)
strlcpy(line, "", sizeof line);
return line;
}
#endif /*NETSNMP_ENABLE_IPV6*/
char *
s_rtflags( struct route_entry *rp )
{
static char flag_buf[10];
char *cp = flag_buf;
*cp++ = '<';
*cp++ = 'U'; /* route is in use */
if (rp->mask == 0xffffffff)
*cp++ = 'H'; /* host */
if (rp->proto == 4)
*cp++ = 'D'; /* ICMP redirect */
if (rp->type == 4)
*cp++ = 'G'; /* remote destination/net */
*cp++ = '>';
*cp = 0;
return flag_buf;
}
void
p_rtnode( struct route_entry *rp )
{
get_ifname(rp->ifname, rp->ifNumber);
printf("%-*.*s ",
WID_DST(AF_INET), WID_DST(AF_INET),
(rp->destination == INADDR_ANY) ? "default" :
(rp->set_bits & SET_MASK) ?
(rp->mask == 0xffffffff ?
routename(rp->destination) :
netname(rp->destination, rp->mask)) :
netname(rp->destination, 0L));
printf("%-*.*s %-6.6s %s\n",
WID_GW(af), WID_GW(af),
rp->gateway ? routename(rp->gateway) : "*",
s_rtflags(rp), rp->ifname);
}