2.11BSD/src/ucb/netstat/route.c
/*
* Copyright (c) 1983,1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#if defined(DOSCCS) && !defined(lint)
static char sccsid[] = "@(#)route.c 5.13.1 (2.11BSD GTE) 1/1/94";
#endif
#include <stdio.h>
#include <strings.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netns/ns.h>
#include <netdb.h>
#ifdef pdp11
#define klseek slseek
#endif
extern int kmem;
extern int nflag;
extern char *routename(), *netname(), *ns_print(), *plural();
extern char *malloc();
/*
* Definitions for showing gateway flags.
*/
struct bits {
short b_mask;
char b_val;
} bits[] = {
{ RTF_UP, 'U' },
{ RTF_GATEWAY, 'G' },
{ RTF_HOST, 'H' },
{ RTF_DYNAMIC, 'D' },
{ RTF_MODIFIED, 'M' },
{ 0 }
};
/*
* Print routing tables.
*/
routepr(hostaddr, netaddr, hashsizeaddr)
off_t hostaddr, netaddr, hashsizeaddr;
{
struct mbuf mb;
register struct rtentry *rt;
register struct mbuf *m;
register struct bits *p;
char name[16], *flags;
struct mbuf **routehash;
struct ifnet ifnet;
int hashsize;
int i, doinghost = 1;
if (hostaddr == 0) {
printf("rthost: symbol not in namelist\n");
return;
}
if (netaddr == 0) {
printf("rtnet: symbol not in namelist\n");
return;
}
if (hashsizeaddr == 0) {
printf("rthashsize: symbol not in namelist\n");
return;
}
klseek(kmem, hashsizeaddr, 0);
read(kmem, (char *)&hashsize, sizeof (hashsize));
routehash = (struct mbuf **)malloc( hashsize*sizeof (struct mbuf *) );
klseek(kmem, hostaddr, 0);
read(kmem, (char *)routehash, hashsize*sizeof (struct mbuf *));
printf("Routing tables\n");
printf("%-16.16s %-18.18s %-6.6s %6.6s%8.8s %s\n",
"Destination", "Gateway",
"Flags", "Refs", "Use", "Interface");
again:
for (i = 0; i < hashsize; i++) {
if (routehash[i] == 0)
continue;
m = routehash[i];
while (m) {
struct sockaddr_in *sin;
klseek(kmem, (off_t)m, 0);
read(kmem, (char *)&mb, sizeof (mb));
rt = mtod(&mb, struct rtentry *);
if ((unsigned)rt < (unsigned)&mb ||
(unsigned)rt >= (unsigned)(&mb + 1)) {
printf("???\n");
return;
}
switch(rt->rt_dst.sa_family) {
case AF_INET:
sin = (struct sockaddr_in *)&rt->rt_dst;
printf("%-16.16s ",
(sin->sin_addr.s_addr == 0) ? "default" :
(rt->rt_flags & RTF_HOST) ?
routename(sin->sin_addr) :
netname(sin->sin_addr, 0L));
sin = (struct sockaddr_in *)&rt->rt_gateway;
printf("%-18.18s ", routename(sin->sin_addr));
break;
case AF_NS:
printf("%-16s ",
ns_print((struct sockaddr_ns *)&rt->rt_dst));
printf("%-18s ",
ns_print((struct sockaddr_ns *)&rt->rt_gateway));
break;
default:
{
u_short *s = (u_short *)rt->rt_dst.sa_data;
printf("(%d)%x %x %x %x %x %x %x ",
rt->rt_dst.sa_family,
s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
s = (u_short *)rt->rt_gateway.sa_data;
printf("(%d)%x %x %x %x %x %x %x ",
rt->rt_gateway.sa_family,
s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
}
}
for (flags = name, p = bits; p->b_mask; p++)
if (p->b_mask & rt->rt_flags)
*flags++ = p->b_val;
*flags = '\0';
printf("%-6.6s %6d %8ld ", name,
rt->rt_refcnt, rt->rt_use);
if (rt->rt_ifp == 0) {
putchar('\n');
m = mb.m_next;
continue;
}
klseek(kmem, (off_t)rt->rt_ifp, 0);
read(kmem, (char *)&ifnet, sizeof (ifnet));
klseek(kmem, (off_t)ifnet.if_name, 0);
read(kmem, name, 16);
printf(" %.15s%d\n", name, ifnet.if_unit);
m = mb.m_next;
}
}
if (doinghost) {
klseek(kmem, netaddr, 0);
read(kmem, (char *)routehash, hashsize*sizeof (struct mbuf *));
doinghost = 0;
goto again;
}
free((char *)routehash);
}
char *
routename(in)
struct in_addr in;
{
register char *cp;
static char line[MAXHOSTNAMELEN + 1];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
char *index();
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = index(domain, '.')))
(void) strcpy(domain, cp + 1);
else
domain[0] = 0;
}
cp = 0;
if (!nflag) {
hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
AF_INET);
if (hp) {
if ((cp = index(hp->h_name, '.')) &&
!strcmp(cp + 1, domain))
*cp = 0;
cp = hp->h_name;
}
}
if (cp)
strncpy(line, cp, sizeof(line) - 1);
else {
#define C(x) (u_char)((x) & 0xff)
in.s_addr = ntohl(in.s_addr);
sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
}
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, mask)
struct in_addr in;
u_long mask;
{
char *cp = 0;
static char line[MAXHOSTNAMELEN + 1];
struct netent *np = 0;
u_long net;
long i;
int subnetshift;
i = ntohl(in.s_addr);
if (!nflag && i) {
if (mask == 0) {
if (IN_CLASSA(i)) {
mask = IN_CLASSA_NET;
subnetshift = 8;
} else if (IN_CLASSB(i)) {
mask = IN_CLASSB_NET;
subnetshift = 8;
} else {
mask = IN_CLASSC_NET;
subnetshift = 4;
}
/*
* If there are more bits than the standard mask
* would suggest, subnets must be in use.
* Guess at the subnet mask, assuming reasonable
* width subnet fields.
*/
while (i &~ mask)
mask = (long)mask >> subnetshift;
}
net = i & mask;
while ((mask & 1) == 0)
mask >>= 1, net >>= 1, net &= 0x7fffffff;
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}
if (cp)
strncpy(line, cp, sizeof(line) - 1);
else if ((i & 0xffffffL) == 0)
sprintf(line, "%u", C(i >> 24));
else if ((i & 0xffffL) == 0)
sprintf(line, "%u.%u", C(i >> 24) , C(i >> 16));
else if ((i & 0xffL) == 0)
sprintf(line, "%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8));
else
sprintf(line, "%u.%u.%u.%u", C(i >> 24),
C(i >> 16), C(i >> 8), C(i));
return (line);
}
/*
* Print routing statistics
*/
rt_stats(off)
off_t off;
{
struct rtstat rtstat;
if (off == 0) {
printf("rtstat: symbol not in namelist\n");
return;
}
klseek(kmem, off, 0);
read(kmem, (char *)&rtstat, sizeof (rtstat));
printf("routing:\n");
printf("\t%u bad routing redirect%s\n",
rtstat.rts_badredirect, plural((long)rtstat.rts_badredirect));
printf("\t%u dynamically created route%s\n",
rtstat.rts_dynamic, plural((long)rtstat.rts_dynamic));
printf("\t%u new gateway%s due to redirects\n",
rtstat.rts_newgateway, plural((long)rtstat.rts_newgateway));
printf("\t%u destination%s found unreachable\n",
rtstat.rts_unreach, plural((long)rtstat.rts_unreach));
printf("\t%u use%s of a wildcard route\n",
rtstat.rts_wildcard, plural((long)rtstat.rts_wildcard));
}
short ns_nullh[] = {0,0,0};
short ns_bh[] = {-1,-1,-1};
char *
ns_print(sns)
struct sockaddr_ns *sns;
{
struct ns_addr work;
union { union ns_net net_e; u_long long_e; } net;
u_short port;
static char mybuf[50], cport[10], chost[25];
char *host = "";
register char *p; register u_char *q;
work = sns->sns_addr;
port = ntohs(work.x_port);
work.x_port = 0;
net.net_e = work.x_net;
if (ns_nullhost(work) && net.long_e == 0) {
if (port ) {
sprintf(mybuf, "*.%xH", port);
upHex(mybuf);
} else
sprintf(mybuf, "*.*");
return (mybuf);
}
if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) {
host = "any";
} else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) {
host = "*";
} else {
q = work.x_host.c_host;
sprintf(chost, "%02x%02x%02x%02x%02x%02xH",
q[0], q[1], q[2], q[3], q[4], q[5]);
for (p = chost; *p == '0' && p < chost + 12; p++);
host = p;
}
if (port)
sprintf(cport, ".%xH", htons(port));
else
*cport = 0;
sprintf(mybuf,"%lxH.%s%s", ntohl(net.long_e), host, cport);
upHex(mybuf);
return(mybuf);
}
char *
ns_phost(sns)
struct sockaddr_ns *sns;
{
struct sockaddr_ns work;
static union ns_net ns_zeronet;
char *p;
work = *sns;
work.sns_addr.x_port = 0;
work.sns_addr.x_net = ns_zeronet;
p = ns_print(&work);
if (strncmp("0H.", p, 3) == 0) p += 3;
return(p);
}
upHex(p0)
char *p0;
{
register char *p = p0;
for (; *p; p++) switch (*p) {
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
*p += ('A' - 'a');
}
}