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[unix-history] / usr / src / sbin / route / route.c
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)route.c 5.6 (Berkeley) %G%";
#endif not lint
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netns/ns.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <netdb.h>
struct rtentry route;
int s;
int forcehost, forcenet, doflush, nflag;
struct sockaddr_in sin = { AF_INET };
struct in_addr inet_makeaddr();
char *malloc();
main(argc, argv)
int argc;
char *argv[];
{
if (argc < 2)
printf("usage: route [ -n ] [ -f ] [ cmd [ net | host ] args ]\n"),
exit(1);
s = socket(AF_INET, SOCK_RAW, 0);
if (s < 0) {
perror("route: socket");
exit(1);
}
argc--, argv++;
for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
for (argv[0]++; *argv[0]; argv[0]++)
switch (*argv[0]) {
case 'f':
doflush++;
break;
case 'n':
nflag++;
break;
}
}
if (doflush)
flushroutes();
if (argc > 0) {
if (strcmp(*argv, "add") == 0)
newroute(argc, argv);
else if (strcmp(*argv, "delete") == 0)
newroute(argc, argv);
else if (strcmp(*argv, "change") == 0)
changeroute(argc-1, argv+1);
else
printf("%s: huh?\n", *argv);
}
}
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
#include <nlist.h>
struct nlist nl[] = {
#define N_RTHOST 0
{ "_rthost" },
#define N_RTNET 1
{ "_rtnet" },
#define N_RTHASHSIZE 2
{ "_rthashsize" },
"",
};
flushroutes()
{
struct mbuf mb;
register struct rtentry *rt;
register struct mbuf *m;
struct mbuf **routehash;
int rthashsize, i, doinghost = 1, kmem;
char *routename(), *netname();
nlist("/vmunix", nl);
if (nl[N_RTHOST].n_value == 0) {
printf("route: \"rthost\", symbol not in namelist\n");
exit(1);
}
if (nl[N_RTNET].n_value == 0) {
printf("route: \"rtnet\", symbol not in namelist\n");
exit(1);
}
if (nl[N_RTHASHSIZE].n_value == 0) {
printf("route: \"rthashsize\", symbol not in namelist\n");
exit(1);
}
kmem = open("/dev/kmem", 0);
if (kmem < 0) {
perror("route: /dev/kmem");
exit(1);
}
lseek(kmem, nl[N_RTHASHSIZE].n_value, 0);
read(kmem, &rthashsize, sizeof (rthashsize));
routehash = (struct mbuf **)malloc(rthashsize*sizeof (struct mbuf *));
lseek(kmem, nl[N_RTHOST].n_value, 0);
read(kmem, routehash, rthashsize*sizeof (struct mbuf *));
printf("Flushing routing tables:\n");
again:
for (i = 0; i < rthashsize; i++) {
if (routehash[i] == 0)
continue;
m = routehash[i];
while (m) {
lseek(kmem, m, 0);
read(kmem, &mb, sizeof (mb));
rt = mtod(&mb, struct rtentry *);
if (rt->rt_flags & RTF_GATEWAY) {
printf("%-20.20s ", doinghost ?
routename(&rt->rt_dst) :
netname(&rt->rt_dst));
printf("%-20.20s ", routename(&rt->rt_gateway));
if (ioctl(s, SIOCDELRT, (caddr_t)rt) < 0)
error("delete");
else
printf("done\n");
}
m = mb.m_next;
}
}
if (doinghost) {
lseek(kmem, nl[N_RTNET].n_value, 0);
read(kmem, routehash, rthashsize*sizeof (struct mbuf *));
doinghost = 0;
goto again;
}
close(kmem);
free(routehash);
}
char *
routename(sa)
struct sockaddr *sa;
{
register char *cp;
static char line[50];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
char *index();
char *ns_print();
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = index(domain, '.')))
(void) strcpy(domain, cp + 1);
else
domain[0] = 0;
}
switch (sa->sa_family) {
case AF_INET:
{ struct in_addr in;
in = ((struct sockaddr_in *)sa)->sin_addr;
cp = 0;
if (in.s_addr == INADDR_ANY)
cp = "default";
if (cp == 0 && !nflag) {
hp = gethostbyaddr(&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)
strcpy(line, cp);
else {
#define C(x) ((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));
}
break;
}
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
default:
{ u_short *s = (u_short *)sa->sa_data;
sprintf(line, "af %d: %x %x %x %x %x %x %x", sa->sa_family,
s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
break;
}
}
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(sa)
struct sockaddr *sa;
{
char *cp = 0;
static char line[50];
struct netent *np = 0;
u_long net, mask;
register i;
int subnetshift;
switch (sa->sa_family) {
case AF_INET:
{ struct in_addr in;
in = ((struct sockaddr_in *)sa)->sin_addr;
in.s_addr = ntohl(in.s_addr);
if (in.s_addr == 0)
cp = "default";
else if (!nflag) {
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 (in.s_addr &~ mask)
mask = (long)mask >> subnetshift;
net = in.s_addr & mask;
while ((mask & 1) == 0)
mask >>= 1, net >>= 1;
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}
if (cp)
strcpy(line, cp);
else if ((in.s_addr & 0xffffff) == 0)
sprintf(line, "%u", C(in.s_addr >> 24));
else if ((in.s_addr & 0xffff) == 0)
sprintf(line, "%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16));
else if ((in.s_addr & 0xff) == 0)
sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8));
else
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));
break;
}
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
break;
default:
{ u_short *s = (u_short *)sa->sa_data;
sprintf(line, "af %d: %x %x %x %x %x %x %x", sa->sa_family,
s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
break;
}
}
return (line);
}
newroute(argc, argv)
int argc;
char *argv[];
{
struct sockaddr_in *sin;
char *cmd, *dest, *gateway;
int ishost, metric = 0, ret, attempts, oerrno;
struct hostent *hp;
extern int errno;
cmd = argv[0];
if ((strcmp(argv[1], "host")) == 0) {
forcehost++;
argc--, argv++;
} else if ((strcmp(argv[1], "net")) == 0) {
forcenet++;
argc--, argv++;
}
if (*cmd == 'a') {
if (argc != 4) {
printf("usage: %s destination gateway metric\n", cmd);
printf("(metric of 0 if gateway is this host)\n");
return;
}
metric = atoi(argv[3]);
} else {
if (argc < 3) {
printf("usage: %s destination gateway\n", cmd);
return;
}
}
sin = (struct sockaddr_in *)&route.rt_dst;
ishost = getaddr(argv[1], &route.rt_dst, &hp, &dest, forcenet);
if (forcehost)
ishost = 1;
if (forcenet)
ishost = 0;
sin = (struct sockaddr_in *)&route.rt_gateway;
(void) getaddr(argv[2], &route.rt_gateway, &hp, &gateway, 0);
route.rt_flags = RTF_UP;
if (ishost)
route.rt_flags |= RTF_HOST;
if (metric > 0)
route.rt_flags |= RTF_GATEWAY;
for (attempts = 1; ; attempts++) {
errno = 0;
if ((ret = ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT,
(caddr_t)&route)) == 0)
break;
if (errno != ENETUNREACH && errno != ESRCH)
break;
if (hp && hp->h_addr_list[1]) {
hp->h_addr_list++;
bcopy(hp->h_addr_list[0], (caddr_t)&sin->sin_addr,
hp->h_length);
} else
break;
}
oerrno = errno;
printf("%s %s %s: gateway %s", cmd, ishost? "host" : "net",
dest, gateway);
if (attempts > 1 && ret == 0)
printf(" (%s)",
inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
if (ret == 0)
printf("\n");
else {
printf(": ");
fflush(stdout);
errno = oerrno;
error(0);
}
}
changeroute(argc, argv)
int argc;
char *argv[];
{
printf("not supported\n");
}
error(cmd)
char *cmd;
{
if (errno == ESRCH)
fprintf(stderr, "not in table\n");
else if (errno == EBUSY)
fprintf(stderr, "entry in use\n");
else if (errno == ENOBUFS)
fprintf(stderr, "routing table overflow\n");
else
perror(cmd);
}
char *
savestr(s)
char *s;
{
char *sav;
sav = malloc(strlen(s) + 1);
if (sav == NULL) {
fprintf("route: out of memory\n");
exit(1);
}
strcpy(sav, s);
return (sav);
}
/*
* Interpret an argument as a network address of some kind,
* returning 1 if a host address, 0 if a network address.
*/
getaddr(s, sin, hpp, name, isnet)
char *s;
struct sockaddr_in *sin;
struct hostent **hpp;
char **name;
int isnet;
{
struct hostent *hp;
struct netent *np;
u_long val;
*hpp = 0;
if (strcmp(s, "default") == 0) {
sin->sin_family = AF_INET;
sin->sin_addr = inet_makeaddr(0, INADDR_ANY);
*name = "default";
return(0);
}
sin->sin_family = AF_INET;
if (isnet == 0) {
val = inet_addr(s);
if (val != -1) {
sin->sin_addr.s_addr = val;
*name = s;
return(inet_lnaof(sin->sin_addr) != INADDR_ANY);
}
}
val = inet_network(s);
if (val != -1) {
sin->sin_addr = inet_makeaddr(val, INADDR_ANY);
*name = s;
return(0);
}
np = getnetbyname(s);
if (np) {
sin->sin_family = np->n_addrtype;
sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
*name = savestr(np->n_name);
return(0);
}
hp = gethostbyname(s);
if (hp) {
*hpp = hp;
sin->sin_family = hp->h_addrtype;
bcopy(hp->h_addr, &sin->sin_addr, hp->h_length);
*name = savestr(hp->h_name);
return(1);
}
fprintf(stderr, "%s: bad value\n", s);
exit(1);
}
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; u_char *q_lim;
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,"%xH.%s%s", ntohl(net.long_e), host, cport);
upHex(mybuf);
return(mybuf);
}
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');
}
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.