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-rw-r--r--apps/snmpnetstat/route.c531
1 files changed, 531 insertions, 0 deletions
diff --git a/apps/snmpnetstat/route.c b/apps/snmpnetstat/route.c
new file mode 100644
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--- /dev/null
+++ b/apps/snmpnetstat/route.c
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+/* $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"
+#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 {
+ oid instance[4];
+ in_addr_t destination;
+ in_addr_t mask;
+ in_addr_t gateway;
+ int ifNumber;
+ int type;
+ int proto;
+ int set_bits;
+ char ifname[64];
+};
+
+void p_rtnode( struct route_entry *rp );
+extern int _ffs(int mask);
+
+/*
+ * 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\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 */
+ 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 );
+ }
+}
+
+
+
+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 );
+ 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;
+
+ 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';
+ } else {
+ sprintf(ip->name, "if%d", ifIndex);
+ }
+ strcpy(name, ip->name);
+}
+
+/*
+ * Print address family header before a section of the routing table.
+ */
+void
+pr_family(int af)
+{
+ const char *afname;
+
+ switch (af) {
+ case AF_INET:
+ afname = "Internet";
+ break;
+#ifdef NETSNMP_ENABLE_IPV6
+ case AF_INET6:
+ afname = "Internet6";
+ break;
+#endif
+ /*
+ case AF_NS:
+ afname = "XNS";
+ break;
+ case AF_IPX:
+ afname = "IPX";
+ break;
+ case AF_CCITT:
+ afname = "X.25";
+ break;
+ case PF_KEY:
+ afname = "Encap";
+ break;
+ case AF_APPLETALK:
+ afname = "AppleTalk";
+ break;
+ */
+ default:
+ afname = NULL;
+ break;
+ }
+ if (afname)
+ printf("\n%s:\n", afname);
+ else
+ printf("\nProtocol Family %d:\n", af);
+}
+
+/* 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(domain, sizeof domain) == 0 &&
+ (cp = strchr(domain, '.')))
+ (void) strlcpy(domain, cp + 1, sizeof domain);
+ else
+ domain[0] = '\0';
+ }
+ cp = NULL;
+ if (!nflag) {
+ hp = 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) ((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;
+
+ memset( flag_buf, 0, sizeof(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++ = '>';
+ 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);
+}
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