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14f33d91ea
NetBSD/sbin/route/route.c
mycroft 2c35f5c582 Compile X.25, OSI, and NS code.
1993-04-25 07:26:40 +00:00

1222 lines
27 KiB
C
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/*
* Copyright (c) 1983, 1989 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)route.c 5.35 (Berkeley) 6/27/91";
static char rcsid[] = "$Header: /cvsroot/src/sbin/route/route.c,v 1.5 1993/04/25 07:26:40 mycroft Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/kinfo.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netns/ns.h>
#include <netiso/iso.h>
#include <netccitt/x25.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
struct keytab {
char *kt_cp;
int kt_i;
} keywords[] = {
#include "keywords.h"
{0, 0}
};
struct ortentry route;
union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_ns sns;
struct sockaddr_iso siso;
struct sockaddr_dl sdl;
struct sockaddr_x25 sx25;
} so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
union sockunion *so_addrs[] =
{ &so_dst, &so_gate, &so_mask, &so_genmask, &so_ifp, &so_ifa, 0};
typedef union sockunion *sup;
int pid, rtm_addrs, uid;
int s;
int forcehost, forcenet, doflush, nflag, af, qflag, tflag, Cflag, keyword();
int iflag, verbose, aflen = sizeof (struct sockaddr_in);
int locking, lockrest, debugonly;
struct sockaddr_in s_in = { sizeof(s_in), AF_INET };
struct rt_metrics rt_metrics;
u_long rtm_inits;
struct in_addr inet_makeaddr();
char *routename(), *netname();
void flushroutes(), newroute(), monitor(), sockaddr();
void print_getmsg(), print_rtmsg(), pmsg_common(), sodump(), bprintf();
int getaddr(), rtmsg();
extern char *inet_ntoa(),
*iso_ntoa(),
*link_ntoa();
void
usage(cp)
char *cp;
{
if (cp)
(void) fprintf(stderr, "route: botched keyword: %s\n", cp);
(void) fprintf(stderr,
"usage: route [ -Cnqv ] cmd [[ -<qualifers> ] args ]\n");
exit(1);
/* NOTREACHED */
}
void
quit(s)
char *s;
{
int sverrno = errno;
(void) fprintf(stderr, "route: ");
if (s)
(void) fprintf(stderr, "%s: ", s);
(void) fprintf(stderr, "%s\n", strerror(sverrno));
exit(1);
/* NOTREACHED */
}
#define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
int ch;
char *argvp;
if (argc < 2)
usage((char *)NULL);
while ((ch = getopt(argc, argv, "Cnqtv")) != EOF)
switch(ch) {
case 'C':
Cflag = 1; /* Use old ioctls. */
break;
case 'n':
nflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'v':
verbose = 1;
break;
case 't':
tflag = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
pid = getpid();
uid = getuid();
if (tflag)
s = open("/dev/null", O_WRONLY, 0);
else if (Cflag)
s = socket(AF_INET, SOCK_RAW, 0);
else
s = socket(PF_ROUTE, SOCK_RAW, 0);
if (s < 0)
quit("socket");
if (*argv)
switch (keyword(*argv)) {
case K_GET:
uid = 0;
/* FALLTHROUGH */
case K_CHANGE:
if (Cflag)
usage("change or get with -C");
/* FALLTHROUGH */
case K_ADD:
case K_DELETE:
newroute(argc, argv);
exit(0);
/* NOTREACHED */
case K_MONITOR:
monitor();
/* NOTREACHED */
case K_FLUSH:
flushroutes(argc, argv);
exit(0);
/* NOTREACHED */
}
usage(*argv);
/* NOTREACHED */
}
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
void
flushroutes(argc, argv)
int argc;
char *argv[];
{
int needed, seqno, rlen;
char *buf, *next, *lim;
register struct rt_msghdr *rtm;
if (uid)
quit("must be root to alter routing table");
shutdown(s, 0); /* Don't want to read back our messages */
if (argc > 1) {
argv++;
if (argc == 2 && **argv == '-')
switch (keyword(*argv + 1)) {
case K_INET:
af = AF_INET;
break;
case K_XNS:
af = AF_NS;
break;
case K_LINK:
af = AF_LINK;
break;
case K_ISO:
case K_OSI:
af = AF_ISO;
break;
case K_X25:
af = AF_CCITT;
default:
goto bad;
} else
bad: usage(*argv);
}
if ((needed = getkerninfo(KINFO_RT_DUMP, 0, 0, 0)) < 0)
quit("route-getkerninfo-estimate");
if ((buf = malloc(needed)) == NULL)
quit("malloc");
if ((rlen = getkerninfo(KINFO_RT_DUMP, buf, &needed, 0)) < 0)
quit("actual retrieval of routing table");
lim = buf + rlen;
seqno = 0; /* ??? */
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
continue;
if (af) {
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
if (sa->sa_family != af)
continue;
}
rtm->rtm_type = RTM_DELETE;
rtm->rtm_seq = seqno;
rlen = write(s, next, rtm->rtm_msglen);
if (rlen < (int)rtm->rtm_msglen) {
(void) fprintf(stderr,
"route: write to routing socket: %s\n",
strerror(errno));
(void) printf("got only %d for rlen\n", rlen);
break;
}
seqno++;
if (qflag)
continue;
if (verbose)
print_rtmsg(rtm, rlen);
else {
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
(void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
routename(sa) : netname(sa));
sa = (struct sockaddr *)(sa->sa_len + (char *)sa);
(void) printf("%-20.20s ", routename(sa));
(void) printf("done\n");
}
}
}
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 *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((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)
strcpy(line, cp);
else {
#define C(x) ((x) & 0xff)
in.s_addr = ntohl(in.s_addr);
(void) 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));
case AF_LINK:
return (link_ntoa((struct sockaddr_dl *)sa));
case AF_ISO:
(void) sprintf(line, "iso %s",
iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr));
break;
default:
{ u_short *s = (u_short *)sa->sa_data;
u_short *slim = s + ((sa->sa_len + 1) >> 1);
char *cp = line + sprintf(line, "(%d)", sa->sa_family);
while (s < slim)
cp += sprintf(cp, " %x", *s++);
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 u_long i;
int subnetshift;
char *ns_print();
switch (sa->sa_family) {
case AF_INET:
{ struct in_addr in;
in = ((struct sockaddr_in *)sa)->sin_addr;
i = 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)
(void) sprintf(line, "%u", C(in.s_addr >> 24));
else if ((in.s_addr & 0xffff) == 0)
(void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16));
else if ((in.s_addr & 0xff) == 0)
(void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8));
else
(void) 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;
case AF_LINK:
return (link_ntoa((struct sockaddr_dl *)sa));
case AF_ISO:
(void) sprintf(line, "iso %s",
iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr));
break;
default:
{ u_short *s = (u_short *)sa->sa_data;
u_short *slim = s + ((sa->sa_len + 1)>>1);
char *cp = line + sprintf(line, "af %d:", sa->sa_family);
while (s < slim)
cp += sprintf(cp, " %x", *s++);
break;
}
}
return (line);
}
void
set_metric(value, key)
char *value;
int key;
{
int flag = 0;
u_long noval, *valp = &noval;
switch (key) {
#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
caseof(K_MTU, RTV_MTU, rmx_mtu);
caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
caseof(K_RTT, RTV_RTT, rmx_rtt);
caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
}
rtm_inits |= flag;
if (lockrest || locking)
rt_metrics.rmx_locks |= flag;
if (locking)
locking = 0;
*valp = atoi(value);
}
void
newroute(argc, argv)
int argc;
register char **argv;
{
char *cmd, *dest = "", *gateway = "", *err;
int ishost = 0, ret, attempts, oerrno, flags = 0;
int key;
struct hostent *hp = 0;
if (uid)
quit("must be root to alter routing table");
cmd = argv[0];
if (*cmd != 'g')
shutdown(s, 0); /* Don't want to read back our messages */
while (--argc > 0) {
if (**(++argv)== '-') {
switch (key = keyword(1 + *argv)) {
case K_LINK:
af = AF_LINK;
aflen = sizeof(struct sockaddr_dl);
break;
case K_OSI:
case K_ISO:
af = AF_ISO;
aflen = sizeof(struct sockaddr_iso);
break;
case K_INET:
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
break;
case K_X25:
af = AF_CCITT;
aflen = sizeof(struct sockaddr_x25);
break;
case K_SA:
af = 0;
aflen = sizeof(union sockunion);
break;
case K_XNS:
af = AF_NS;
aflen = sizeof(struct sockaddr_ns);
break;
case K_IFACE:
case K_INTERFACE:
iflag++;
break;
case K_LOCK:
locking = 1;
break;
case K_LOCKREST:
lockrest = 1;
break;
case K_HOST:
forcehost++;
break;
case K_REJECT:
flags |= RTF_REJECT;
break;
case K_PROTO1:
flags |= RTF_PROTO1;
break;
case K_PROTO2:
flags |= RTF_PROTO2;
break;
case K_CLONING:
flags |= RTF_CLONING;
break;
case K_XRESOLVE:
flags |= RTF_XRESOLVE;
break;
case K_IFA:
argc--;
(void) getaddr(RTA_IFA, *++argv, 0);
break;
case K_IFP:
argc--;
(void) getaddr(RTA_IFP, *++argv, 0);
break;
case K_GENMASK:
argc--;
(void) getaddr(RTA_GENMASK, *++argv, 0);
break;
case K_GATEWAY:
argc--;
(void) getaddr(RTA_GATEWAY, *++argv, 0);
break;
case K_DST:
argc--;
ishost = getaddr(RTA_DST, *++argv, &hp);
dest = *argv;
break;
case K_NETMASK:
argc--;
(void) getaddr(RTA_NETMASK, *++argv, 0);
/* FALLTHROUGH */
case K_NET:
forcenet++;
break;
case K_MTU:
case K_HOPCOUNT:
case K_EXPIRE:
case K_RECVPIPE:
case K_SENDPIPE:
case K_SSTHRESH:
case K_RTT:
case K_RTTVAR:
argc--;
set_metric(*++argv, key);
break;
default:
usage(1+*argv);
}
} else {
if ((rtm_addrs & RTA_DST) == 0) {
dest = *argv;
ishost = getaddr(RTA_DST, *argv, &hp);
} else if ((rtm_addrs & RTA_GATEWAY) == 0) {
gateway = *argv;
(void) getaddr(RTA_GATEWAY, *argv, &hp);
} else {
int ret = atoi(*argv);
if (ret == 0) {
printf("%s,%s", "old usage of trailing 0",
"assuming route to if\n");
iflag = 1;
continue;
} else if (ret > 0 && ret < 10) {
printf("old usage of trailing digit, ");
printf("assuming route via gateway\n");
iflag = 0;
continue;
}
(void) getaddr(RTA_NETMASK, *argv, 0);
}
}
}
if (forcehost)
ishost = 1;
if (forcenet)
ishost = 0;
flags |= RTF_UP;
if (ishost)
flags |= RTF_HOST;
if (iflag == 0)
flags |= RTF_GATEWAY;
for (attempts = 1; ; attempts++) {
errno = 0;
if (Cflag && (af == AF_INET || af == AF_NS)) {
route.rt_flags = flags;
route.rt_dst = so_dst.sa;
route.rt_gateway = so_gate.sa;
if ((ret = ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT,
(caddr_t)&route)) == 0)
break;
} else {
if ((ret = rtmsg(*cmd, flags)) == 0)
break;
}
if (errno != ENETUNREACH && errno != ESRCH)
break;
if (af == AF_INET && hp && hp->h_addr_list[1]) {
hp->h_addr_list++;
bcopy(hp->h_addr_list[0], (caddr_t)&so_dst.sin.sin_addr,
hp->h_length);
} else
break;
}
if (*cmd == 'g')
exit(0);
oerrno = errno;
(void) printf("%s %s %s: gateway %s", cmd, ishost? "host" : "net",
dest, gateway);
if (attempts > 1 && ret == 0)
(void) printf(" (%s)",
inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
if (ret == 0)
(void) printf("\n");
else {
switch (oerrno) {
case ESRCH:
err = "not in table";
break;
case EBUSY:
err = "entry in use";
break;
case ENOBUFS:
err = "routing table overflow";
break;
default:
err = strerror(oerrno);
break;
}
(void) printf(": %s\n", err);
}
}
void
inet_makenetandmask(net, s_in)
u_long net;
register struct sockaddr_in *s_in;
{
u_long addr, mask = 0;
register char *cp;
rtm_addrs |= RTA_NETMASK;
if (net == 0)
mask = addr = 0;
else if (net < 128) {
addr = net << IN_CLASSA_NSHIFT;
mask = IN_CLASSA_NET;
} else if (net < 65536) {
addr = net << IN_CLASSB_NSHIFT;
mask = IN_CLASSB_NET;
} else if (net < 16777216L) {
addr = net << IN_CLASSC_NSHIFT;
mask = IN_CLASSC_NET;
} else {
addr = net;
if ((addr & IN_CLASSA_HOST) == 0)
mask = IN_CLASSA_NET;
else if ((addr & IN_CLASSB_HOST) == 0)
mask = IN_CLASSB_NET;
else if ((addr & IN_CLASSC_HOST) == 0)
mask = IN_CLASSC_NET;
else
mask = -1;
}
s_in->sin_addr.s_addr = htonl(addr);
s_in = &so_mask.sin;
s_in->sin_addr.s_addr = htonl(mask);
s_in->sin_len = 0;
s_in->sin_family = 0;
cp = (char *)(&s_in->sin_addr + 1);
while (*--cp == 0 && cp > (char *)s_in)
;
s_in->sin_len = 1 + cp - (char *)s_in;
}
/*
* Interpret an argument as a network address of some kind,
* returning 1 if a host address, 0 if a network address.
*/
int
getaddr(which, s, hpp)
int which;
char *s;
struct hostent **hpp;
{
register sup su;
struct ns_addr ns_addr();
struct iso_addr *iso_addr();
struct hostent *hp;
struct netent *np;
u_long val;
if (af == 0) {
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
}
rtm_addrs |= which;
switch (which) {
case RTA_DST: su = so_addrs[0]; su->sa.sa_family = af; break;
case RTA_GATEWAY: su = so_addrs[1]; su->sa.sa_family = af; break;
case RTA_NETMASK: su = so_addrs[2]; break;
case RTA_GENMASK: su = so_addrs[3]; break;
case RTA_IFP: su = so_addrs[4]; su->sa.sa_family = af; break;
case RTA_IFA: su = so_addrs[5]; su->sa.sa_family = af; break;
default: usage("Internal Error"); /*NOTREACHED*/
}
su->sa.sa_len = aflen;
if (strcmp(s, "default") == 0) {
switch (which) {
case RTA_DST:
forcenet++;
(void) getaddr(RTA_NETMASK, s, 0);
break;
case RTA_NETMASK:
case RTA_GENMASK:
su->sa.sa_len = 0;
}
return 0;
}
if (af == AF_NS)
goto do_xns;
if (af == AF_OSI)
goto do_osi;
if (af == AF_LINK)
goto do_link;
if (af == AF_CCITT)
goto do_ccitt;
if (af == 0)
goto do_sa;
if (hpp == NULL)
hpp = &hp;
*hpp = NULL;
if (((val = inet_addr(s)) != -1) &&
(which != RTA_DST || forcenet == 0)) {
su->sin.sin_addr.s_addr = val;
if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
return (1);
else {
val = ntohl(val);
out: if (which == RTA_DST)
inet_makenetandmask(val, &su->sin);
return (0);
}
}
val = inet_network(s);
if (val != -1) {
goto out;
}
np = getnetbyname(s);
if (np) {
val = np->n_net;
goto out;
}
hp = gethostbyname(s);
if (hp) {
*hpp = hp;
su->sin.sin_family = hp->h_addrtype;
bcopy(hp->h_addr, (char *)&su->sin.sin_addr, hp->h_length);
return (1);
}
(void) fprintf(stderr, "%s: bad value\n", s);
exit(1);
do_xns:
if (which == RTA_DST) {
extern short ns_bh[3];
struct sockaddr_ns *sms = &(so_mask.sns);
bzero((char *)sms, sizeof(*sms));
sms->sns_family = 0;
sms->sns_len = 6;
sms->sns_addr.x_net = *(union ns_net *)ns_bh;
rtm_addrs |= RTA_NETMASK;
}
su->sns.sns_addr = ns_addr(s);
return (!ns_nullhost(su->sns.sns_addr));
do_osi:
su->siso.siso_addr = *iso_addr(s);
if (which == RTA_NETMASK || which == RTA_GENMASK) {
register char *cp = (char *)TSEL(&su->siso);
su->siso.siso_nlen = 0;
do {--cp ;} while ((cp > (char *)su) && (*cp == 0));
su->siso.siso_len = 1 + cp - (char *)su;
}
return (1);
do_ccitt:
ccitt_addr(s, &su->sx25);
return (1);
do_link:
link_addr(s, &su->sdl);
return (1);
do_sa:
su->sa.sa_len = sizeof(*su);
sockaddr(s, &su->sa);
return (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;
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)
return ("*.*");
(void) sprintf(mybuf, "*.%XH", port);
return (mybuf);
}
if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0)
host = "any";
else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0)
host = "*";
else {
q = work.x_host.c_host;
(void) 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++)
/* void */;
host = p;
}
if (port)
(void) sprintf(cport, ".%XH", htons(port));
else
*cport = 0;
(void) sprintf(mybuf,"%XH.%s%s", ntohl(net.long_e), host, cport);
return (mybuf);
}
void
monitor()
{
int n;
char msg[2048];
verbose = 1;
for(;;) {
n = read(s, msg, 2048);
(void) printf("got message of size %d\n", n);
print_rtmsg((struct rt_msghdr *)msg);
}
}
struct {
struct rt_msghdr m_rtm;
char m_space[512];
} m_rtmsg;
int
rtmsg(cmd, flags)
int cmd, flags;
{
static int seq;
int rlen;
register char *cp = m_rtmsg.m_space;
register int l;
#define NEXTADDR(w, u) \
if (rtm_addrs & (w)) {\
l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\
if (verbose) sodump(&(u),"u");\
}
errno = 0;
bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
if (cmd == 'a')
cmd = RTM_ADD;
else if (cmd == 'c')
cmd = RTM_CHANGE;
else if (cmd == 'g')
cmd = RTM_GET;
else
cmd = RTM_DELETE;
#define rtm m_rtmsg.m_rtm
rtm.rtm_type = cmd;
rtm.rtm_flags = flags;
rtm.rtm_version = RTM_VERSION;
rtm.rtm_seq = ++seq;
rtm.rtm_addrs = rtm_addrs;
rtm.rtm_rmx = rt_metrics;
rtm.rtm_inits = rtm_inits;
if (rtm_addrs & RTA_NETMASK)
mask_addr();
NEXTADDR(RTA_DST, so_dst);
NEXTADDR(RTA_GATEWAY, so_gate);
NEXTADDR(RTA_NETMASK, so_mask);
NEXTADDR(RTA_GENMASK, so_genmask);
NEXTADDR(RTA_IFP, so_ifp);
NEXTADDR(RTA_IFA, so_ifa);
rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
if (verbose)
print_rtmsg(&rtm, l);
if (debugonly)
return 0;
if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
perror("writing to routing socket");
return (-1);
}
if (cmd == RTM_GET) {
do {
l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
if (l < 0)
(void) fprintf(stderr,
"route: read from routing socket: %s\n",
strerror(errno));
else
print_getmsg(&rtm, l);
}
#undef rtm
return (0);
}
mask_addr() {
register char *cp1, *cp2;
int olen;
if ((rtm_addrs & RTA_DST) == 0)
return;
switch(so_dst.sa.sa_family) {
case AF_NS:
case AF_INET: case 0:
return;
case AF_ISO:
olen = MIN(so_dst.siso.siso_nlen, so_mask.sa.sa_len - 6);
}
cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
while (cp2 > cp1)
*--cp2 = 0;
cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
while (cp1 > so_dst.sa.sa_data)
*--cp1 &= *--cp2;
switch(so_dst.sa.sa_family) {
case AF_ISO:
so_dst.siso.siso_nlen = olen;
}
}
char *msgtypes[] = {
"",
"RTM_ADD: Add Route",
"RTM_DELETE: Delete Route",
"RTM_CHANGE: Change Metrics or flags",
"RTM_GET: Report Metrics",
"RTM_LOSING: Kernel Suspects Partitioning",
"RTM_REDIRECT: Told to use different route",
"RTM_MISS: Lookup failed on this address",
"RTM_LOCK: fix specified metrics",
"RTM_OLDADD: caused by SIOCADDRT",
"RTM_OLDDEL: caused by SIOCDELRT",
0,
};
char metricnames[] =
"\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu";
char routeflags[] =
"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\017PROTO2\020PROTO1";
void
print_rtmsg(rtm, msglen)
register struct rt_msghdr *rtm;
int msglen;
{
if (verbose == 0)
return;
if (rtm->rtm_version != RTM_VERSION) {
(void) printf("routing message version %d not understood\n",
rtm->rtm_version);
return;
}
(void) printf("%s\npid: %d, len %d, seq %d, errno %d, flags:",
msgtypes[rtm->rtm_type], rtm->rtm_pid, rtm->rtm_msglen,
rtm->rtm_seq, rtm->rtm_errno);
bprintf(stdout, rtm->rtm_flags, routeflags);
pmsg_common(rtm);
}
void
print_getmsg(rtm, msglen)
register struct rt_msghdr *rtm;
int msglen;
{
if (rtm->rtm_version != RTM_VERSION) {
(void)printf("routing message version %d not understood\n",
rtm->rtm_version);
return;
}
if (rtm->rtm_msglen > msglen) {
(void)printf("get length mismatch, in packet %d, returned %d\n",
rtm->rtm_msglen, msglen);
}
(void) printf("RTM_GET: errno %d, flags:", rtm->rtm_errno);
bprintf(stdout, rtm->rtm_flags, routeflags);
(void) printf("\nmetric values:\n ");
#define metric(f, e)\
printf("%s: %d%s", __STRING(f), rtm->rtm_rmx.__CONCAT(rmx_,f), e)
metric(recvpipe, ", ");
metric(sendpipe, ", ");
metric(ssthresh, ", ");
metric(rtt, "\n ");
metric(rttvar, ", ");
metric(hopcount, ", ");
metric(mtu, ", ");
metric(expire, "\n");
#undef metric
pmsg_common(rtm);
}
void
pmsg_common(rtm)
register struct rt_msghdr *rtm;
{
char *cp;
register struct sockaddr *sa;
int i;
(void) printf("\nlocks: ");
bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
(void) printf(" inits: ");
bprintf(stdout, rtm->rtm_inits, metricnames);
(void) printf("\nsockaddrs: ");
bprintf(stdout, rtm->rtm_addrs,
"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR");
(void) putchar('\n');
cp = ((char *)(rtm + 1));
if (rtm->rtm_addrs)
for (i = 1; i; i <<= 1)
if (i & rtm->rtm_addrs) {
sa = (struct sockaddr *)cp;
(void) printf(" %s", routename(sa));
ADVANCE(cp, sa);
}
(void) putchar('\n');
(void) fflush(stdout);
}
void
bprintf(fp, b, s)
register FILE *fp;
register int b;
register u_char *s;
{
register int i;
int gotsome = 0;
if (b == 0)
return;
while (i = *s++) {
if (b & (1 << (i-1))) {
if (gotsome == 0)
i = '<';
else
i = ',';
(void) putc(i, fp);
gotsome = 1;
for (; (i = *s) > 32; s++)
(void) putc(i, fp);
} else
while (*s > 32)
s++;
}
if (gotsome)
(void) putc('>', fp);
}
int
keyword(cp)
char *cp;
{
register struct keytab *kt = keywords;
while (kt->kt_cp && strcmp(kt->kt_cp, cp))
kt++;
return kt->kt_i;
}
void
sodump(su, which)
register sup su;
char *which;
{
switch (su->sa.sa_family) {
case AF_LINK:
(void) printf("%s: link %s; ",
which, link_ntoa(&su->sdl));
break;
case AF_ISO:
(void) printf("%s: iso %s; ",
which, iso_ntoa(&su->siso.siso_addr));
break;
case AF_INET:
(void) printf("%s: inet %s; ",
which, inet_ntoa(su->sin.sin_addr));
break;
case AF_NS:
(void) printf("%s: xns %s; ",
which, ns_ntoa(su->sns.sns_addr));
break;
}
(void) fflush(stdout);
}
/* States*/
#define VIRGIN 0
#define GOTONE 1
#define GOTTWO 2
/* Inputs */
#define DIGIT (4*0)
#define END (4*1)
#define DELIM (4*2)
void
sockaddr(addr, sa)
register char *addr;
register struct sockaddr *sa;
{
register char *cp = (char *)sa;
int size = sa->sa_len;
char *cplim = cp + size;
register int byte = 0, state = VIRGIN, new;
bzero(cp, size);
do {
if ((*addr >= '0') && (*addr <= '9')) {
new = *addr - '0';
} else if ((*addr >= 'a') && (*addr <= 'f')) {
new = *addr - 'a' + 10;
} else if ((*addr >= 'A') && (*addr <= 'F')) {
new = *addr - 'A' + 10;
} else if (*addr == 0)
state |= END;
else
state |= DELIM;
addr++;
switch (state /* | INPUT */) {
case GOTTWO | DIGIT:
*cp++ = byte; /*FALLTHROUGH*/
case VIRGIN | DIGIT:
state = GOTONE; byte = new; continue;
case GOTONE | DIGIT:
state = GOTTWO; byte = new + (byte << 4); continue;
default: /* | DELIM */
state = VIRGIN; *cp++ = byte; byte = 0; continue;
case GOTONE | END:
case GOTTWO | END:
*cp++ = byte; /* FALLTHROUGH */
case VIRGIN | END:
break;
}
break;
} while (cp < cplim);
sa->sa_len = cp - (char *)sa;
}
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