NetBSD/sbin/route/route.c

1534 lines
34 KiB
C

/* $NetBSD: route.c,v 1.29 1998/07/26 15:03:51 mycroft Exp $ */
/*
* Copyright (c) 1983, 1989, 1991, 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: route.c,v 1.29 1998/07/26 15:03:51 mycroft Exp $");
#endif
#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/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netatalk/at.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 <time.h>
#include <paths.h>
#include <err.h>
#include "keywords.h"
#include "extern.h"
typedef union sockunion *sup;
int main __P((int, char **));
static void usage __P((char *));
static char *any_ntoa __P((const struct sockaddr *));
static void set_metric __P((char *, int));
static void newroute __P((int, char **));
static void inet_makenetandmask __P((u_int32_t, struct sockaddr_in *));
static int getaddr __P((int, char *, struct hostent **));
#ifndef SMALL
static void flushroutes __P((int, char *[]));
static int x25_makemask __P((void));
static void interfaces __P((void));
static void monitor __P((void));
static void print_getmsg __P((struct rt_msghdr *, int));
#endif
static int rtmsg __P((int, int ));
static void mask_addr __P((void));
static void print_rtmsg __P((struct rt_msghdr *, int));
static void pmsg_common __P((struct rt_msghdr *));
static void pmsg_addrs __P((char *, int));
static void bprintf __P((FILE *, int, u_char *));
static int keyword __P((char *));
static void sodump __P((sup, char *));
static void sockaddr __P((char *, struct sockaddr *));
struct ortentry route;
union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_at sat;
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;
int pid, rtm_addrs;
int s;
int forcehost, forcenet, doflush, nflag, af, qflag, tflag;
int iflag, verbose, aflen = sizeof (struct sockaddr_in);
int locking, lockrest, debugonly;
struct rt_metrics rt_metrics;
u_int32_t rtm_inits;
static void
usage(cp)
char *cp;
{
extern char *__progname;
if (cp)
warnx("botched keyword: %s", cp);
(void) fprintf(stderr,
"Usage: %s [ -nqv ] cmd [[ -<qualifers> ] args ]\n", __progname);
exit(1);
/* NOTREACHED */
}
#define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(int32_t) - 1))) : sizeof(int32_t))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
int
main(argc, argv)
int argc;
char **argv;
{
int ch;
if (argc < 2)
usage(NULL);
while ((ch = getopt(argc, argv, "nqdtv")) != -1)
switch(ch) {
case 'n':
nflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'v':
verbose = 1;
break;
case 't':
tflag = 1;
break;
case 'd':
debugonly = 1;
break;
case '?':
default:
usage(NULL);
}
argc -= optind;
argv += optind;
pid = getpid();
if (tflag)
s = open("/dev/null", O_WRONLY, 0);
else
s = socket(PF_ROUTE, SOCK_RAW, 0);
if (s < 0)
err(1, "socket");
if (*argv == NULL)
goto no_cmd;
switch (keyword(*argv)) {
#ifndef SMALL
case K_GET:
#endif /* SMALL */
case K_CHANGE:
case K_ADD:
case K_DELETE:
newroute(argc, argv);
break;
case K_SHOW:
show(argc, argv);
break;
#ifndef SMALL
case K_MONITOR:
monitor();
break;
case K_FLUSH:
flushroutes(argc, argv);
break;
#endif /* SMALL */
no_cmd:
default:
usage(*argv);
return 1;
}
return 0;
}
#ifndef SMALL
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
static void
flushroutes(argc, argv)
int argc;
char *argv[];
{
size_t needed;
int mib[6], rlen, seqno;
char *buf, *next, *lim;
struct rt_msghdr *rtm;
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_ATALK:
af = AF_APPLETALK;
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);
}
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = 0; /* wildcard address family */
mib[4] = NET_RT_DUMP;
mib[5] = 0; /* no flags */
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(1, "route-sysctl-estimate");
if (needed == 0)
return;
if ((buf = malloc(needed)) == NULL)
err(1, "malloc");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(1, "actual retrieval of routing table");
lim = buf + needed;
if (verbose) {
(void) printf("Examining routing table from sysctl\n");
if (af) printf("(address family %s)\n", (*argv + 1));
}
seqno = 0; /* ??? */
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if (verbose)
print_rtmsg(rtm, rtm->rtm_msglen);
if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
continue;
if (af) {
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
if (sa->sa_family != af)
continue;
}
if (debugonly)
continue;
rtm->rtm_type = RTM_DELETE;
rtm->rtm_seq = seqno;
rlen = write(s, next, rtm->rtm_msglen);
if (rlen < (int)rtm->rtm_msglen) {
warn("write to routing socket, got %d for rlen", 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");
}
}
}
#endif /* SMALL */
static char hexlist[] = "0123456789abcdef";
static char *
any_ntoa(sa)
const struct sockaddr *sa;
{
static char obuf[64];
const char *in;
char *out;
int len;
len = sa->sa_len;
in = sa->sa_data;
out = obuf;
do {
*out++ = hexlist[(*in >> 4) & 15];
*out++ = hexlist[(*in++) & 15];
*out++ = '.';
} while (--len > 0);
out[-1] = '\0';
return obuf;
}
char *
routename(sa)
struct sockaddr *sa;
{
char *cp;
static char line[50];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
struct in_addr in;
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = strchr(domain, '.'))) {
(void)strncpy(domain, cp + 1, sizeof(domain) - 1);
domain[sizeof(domain) - 1] = '\0';
} else
domain[0] = 0;
}
if (sa->sa_len == 0) {
strncpy(line, "default", sizeof(line) - 1);
line[sizeof(line) - 1] = '\0';
} else switch (sa->sa_family) {
case AF_INET:
in = ((struct sockaddr_in *)sa)->sin_addr;
cp = 0;
if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
cp = "default";
if (cp == 0 && !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)
(void)strncpy(line, cp, sizeof(line) - 1);
else
(void)strncpy(line, inet_ntoa(in), sizeof(line) - 1);
line[sizeof(line) - 1] = '\0';
break;
case AF_LINK:
return (link_ntoa((struct sockaddr_dl *)sa));
#ifndef SMALL
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
case AF_ISO:
(void)snprintf(line, sizeof line, "iso %s",
iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr));
break;
case AF_APPLETALK:
(void) snprintf(line, sizeof(line), "atalk %d.%d",
((struct sockaddr_at *)sa)->sat_addr.s_net,
((struct sockaddr_at *)sa)->sat_addr.s_node);
break;
#endif /* SMALL */
default:
(void)snprintf(line, sizeof line, "(%d) %s",
sa->sa_family, any_ntoa(sa));
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_int32_t net, mask;
u_int32_t i;
int subnetshift;
struct in_addr in;
switch (sa->sa_family) {
case AF_INET:
in = ((struct sockaddr_in *)sa)->sin_addr;
i = ntohl(in.s_addr);
if (i == 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 (i &~ mask)
mask = (int32_t)mask >> subnetshift;
net = i & mask;
while ((mask & 1) == 0)
mask >>= 1, net >>= 1;
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}
if (cp) {
(void)strncpy(line, cp, sizeof(line) - 1);
line[sizeof(line) - 1] = '\0';
} else {
#if 0 /* XXX - This is silly... */
#define C(x) ((x) & 0xff)
if ((i & 0xffffff) == 0)
(void)snprintf(line, sizeof line, "%u",
C(i >> 24));
else if ((i & 0xffff) == 0)
(void)snprintf(line, sizeof line, "%u.%u",
C(i >> 24), C(i >> 16));
else if ((i & 0xff) == 0)
(void)snprintf(line, sizeof line, "%u.%u.%u",
C(i >> 24), C(i >> 16), C(i >> 8));
else
(void)snprintf(line, sizeof line, "%u.%u.%u.%u",
C(i >> 24), C(i >> 16), C(i >> 8), C(i));
#undef C
#else /* XXX */
(void)strncpy(line, inet_ntoa(in), sizeof(line) - 1);
#endif /* XXX */
}
break;
case AF_LINK:
return (link_ntoa((struct sockaddr_dl *)sa));
#ifndef SMALL
case AF_NS:
return (ns_print((struct sockaddr_ns *)sa));
case AF_ISO:
(void)snprintf(line, sizeof line, "iso %s",
iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr));
break;
case AF_APPLETALK:
(void) snprintf(line, sizeof(line), "atalk %d.%d",
((struct sockaddr_at *)sa)->sat_addr.s_net,
((struct sockaddr_at *)sa)->sat_addr.s_node);
break;
#endif /* SMALL */
default:
(void)snprintf(line, sizeof line, "af %d: %s",
sa->sa_family, any_ntoa(sa));
break;
}
return (line);
}
static 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);
}
static void
newroute(argc, argv)
int argc;
char **argv;
{
char *cmd, *dest = "", *gateway = "";
const char *err;
int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
int key;
struct hostent *hp = 0;
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_SA:
af = PF_ROUTE;
aflen = sizeof(union sockunion);
break;
case K_ATALK:
af = AF_APPLETALK;
aflen = sizeof(struct sockaddr_at);
break;
case K_INET:
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
break;
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_X25:
af = AF_CCITT;
aflen = sizeof(struct sockaddr_x25);
break;
case K_XNS:
af = AF_NS;
aflen = sizeof(struct sockaddr_ns);
break;
case K_IFACE:
case K_INTERFACE:
iflag++;
break;
case K_NOSTATIC:
flags &= ~RTF_STATIC;
break;
case K_LLINFO:
flags |= RTF_LLINFO;
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_BLACKHOLE:
flags |= RTF_BLACKHOLE;
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_STATIC:
flags |= RTF_STATIC;
break;
case K_IFA:
if (!--argc)
usage(1+*argv);
(void) getaddr(RTA_IFA, *++argv, 0);
break;
case K_IFP:
if (!--argc)
usage(1+*argv);
(void) getaddr(RTA_IFP, *++argv, 0);
break;
case K_GENMASK:
if (!--argc)
usage(1+*argv);
(void) getaddr(RTA_GENMASK, *++argv, 0);
break;
case K_GATEWAY:
if (!--argc)
usage(1+*argv);
(void) getaddr(RTA_GATEWAY, *++argv, 0);
break;
case K_DST:
if (!--argc)
usage(1+*argv);
ishost = getaddr(RTA_DST, *++argv, &hp);
dest = *argv;
break;
case K_NETMASK:
if (!--argc)
usage(1+*argv);
(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:
if (!--argc)
usage(1+*argv);
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) {
if (!qflag && strcmp(*argv, "0") == 0)
warnx("%s, %s",
"old usage of trailing 0",
"assuming route to if");
else
usage((char *)NULL);
iflag = 1;
continue;
} else if (ret > 0 && ret < 10) {
if (!qflag) {
warnx("%s, %s",
"old usage of trailing digit",
"assuming route via gateway");
}
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 ((ret = rtmsg(*cmd, flags)) == 0)
break;
if (errno != ENETUNREACH && errno != ESRCH)
break;
if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
hp->h_addr_list++;
memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
hp->h_length);
} else
break;
}
if (*cmd == 'g')
exit(0);
oerrno = errno;
if (!qflag) {
(void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
if (*gateway) {
(void) printf(": gateway %s", gateway);
if (attempts > 1 && ret == 0 && af == AF_INET)
(void) printf(" (%s)",
inet_ntoa(((struct sockaddr_in *)
&route.rt_gateway)->sin_addr));
}
if (ret == 0)
(void) printf("\n");
}
if (ret != 0) {
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);
}
}
static void
inet_makenetandmask(net, sin)
u_int32_t net;
struct sockaddr_in *sin;
{
u_int32_t addr, mask = 0;
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;
}
sin->sin_addr.s_addr = htonl(addr);
sin = &so_mask.sin;
sin->sin_addr.s_addr = htonl(mask);
sin->sin_len = 0;
sin->sin_family = 0;
cp = (char *)(&sin->sin_addr + 1);
while (*--cp == 0 && cp > (char *)sin)
;
sin->sin_len = 1 + cp - (char *)sin;
}
/*
* Interpret an argument as a network address of some kind,
* returning 1 if a host address, 0 if a network address.
*/
static int
getaddr(which, s, hpp)
int which;
char *s;
struct hostent **hpp;
{
sup su;
struct hostent *hp;
struct netent *np;
u_int32_t val;
char *t;
if (af == 0) {
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
}
rtm_addrs |= which;
switch (which) {
case RTA_DST:
su = &so_dst;
su->sa.sa_family = af;
break;
case RTA_GATEWAY:
su = &so_gate;
su->sa.sa_family = af;
break;
case RTA_NETMASK:
su = &so_mask;
break;
case RTA_GENMASK:
su = &so_genmask;
break;
case RTA_IFP:
su = &so_ifp;
su->sa.sa_family = af;
break;
case RTA_IFA:
su = &so_ifa;
su->sa.sa_family = af;
break;
default:
su = NULL;
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);
}
switch (af) {
#ifndef SMALL
case AF_NS:
if (which == RTA_DST) {
extern short ns_bh[3];
struct sockaddr_ns *sms = &(so_mask.sns);
memset(sms, 0, 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));
case AF_OSI:
su->siso.siso_addr = *iso_addr(s);
if (which == RTA_NETMASK || which == RTA_GENMASK) {
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);
case AF_CCITT:
ccitt_addr(s, &su->sx25);
return (which == RTA_DST ? x25_makemask() : 1);
#endif /* SMALL */
case PF_ROUTE:
su->sa.sa_len = sizeof(*su);
sockaddr(s, &su->sa);
return (1);
case AF_APPLETALK:
t = strchr (s, '.');
if (!t) {
badataddr:
errx(1, "bad address: %s", s);
}
val = atoi (s);
if (val > 65535)
goto badataddr;
su->sat.sat_addr.s_net = val;
val = atoi (t);
if (val > 256)
goto badataddr;
su->sat.sat_addr.s_node = val;
rtm_addrs |= RTA_NETMASK;
return(forcehost || su->sat.sat_addr.s_node != 0);
case AF_LINK:
link_addr(s, &su->sdl);
return (1);
case AF_INET:
default:
break;
}
if (hpp == NULL)
hpp = &hp;
*hpp = NULL;
if (((val = inet_addr(s)) != INADDR_NONE) &&
(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);
goto netdone;
}
}
if ((val = inet_network(s)) != INADDR_NONE ||
((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) {
netdone:
if (which == RTA_DST)
inet_makenetandmask(val, &su->sin);
return (0);
}
hp = gethostbyname(s);
if (hp) {
*hpp = hp;
su->sin.sin_family = hp->h_addrtype;
memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length);
return (1);
}
errx(1, "bad value: %s", s);
}
#ifndef SMALL
int
x25_makemask()
{
char *cp;
if ((rtm_addrs & RTA_NETMASK) == 0) {
rtm_addrs |= RTA_NETMASK;
for (cp = (char *)&so_mask.sx25.x25_net;
cp < &so_mask.sx25.x25_opts.op_flags; cp++)
*cp = -1;
so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts);
}
return 0;
}
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_int32_t int32_t_e; } net;
u_short port;
static char mybuf[50], cport[10], chost[25];
char *host = "";
char *p;
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.int32_t_e == 0) {
if (!port)
return ("*.*");
(void)snprintf(mybuf, sizeof mybuf, "*.%XH", port);
return (mybuf);
}
if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
host = "any";
else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
host = "*";
else {
q = work.x_host.c_host;
(void)snprintf(chost, sizeof 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)snprintf(cport, sizeof cport, ".%XH", htons(port));
else
*cport = 0;
(void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s",
(u_int32_t)ntohl(net.int32_t_e), host, cport);
return (mybuf);
}
static void
interfaces()
{
size_t needed;
int mib[6];
char *buf, *lim, *next;
struct rt_msghdr *rtm;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = 0; /* wildcard address family */
mib[4] = NET_RT_IFLIST;
mib[5] = 0; /* no flags */
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(1, "route-sysctl-estimate");
if ((buf = malloc(needed)) == NULL)
err(1, "malloc");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(1, "actual retrieval of interface table");
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
print_rtmsg(rtm, rtm->rtm_msglen);
}
}
static void
monitor()
{
int n;
char msg[2048];
verbose = 1;
if (debugonly) {
interfaces();
exit(0);
}
for(;;) {
n = read(s, msg, 2048);
(void) printf("got message of size %d\n", n);
print_rtmsg((struct rt_msghdr *)msg, n);
}
}
#endif /* SMALL */
struct {
struct rt_msghdr m_rtm;
char m_space[512];
} m_rtmsg;
static int
rtmsg(cmd, flags)
int cmd, flags;
{
static int seq;
int rlen;
char *cp = m_rtmsg.m_space;
int l;
#define NEXTADDR(w, u) \
if (rtm_addrs & (w)) {\
l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
if (verbose) sodump(&(u),"u");\
}
errno = 0;
memset(&m_rtmsg, 0, sizeof(m_rtmsg));
if (cmd == 'a')
cmd = RTM_ADD;
else if (cmd == 'c')
cmd = RTM_CHANGE;
else if (cmd == 'g') {
#ifdef SMALL
return (-1);
#else /* SMALL */
cmd = RTM_GET;
if (so_ifp.sa.sa_family == 0) {
so_ifp.sa.sa_family = AF_LINK;
so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
rtm_addrs |= RTA_IFP;
}
#endif /* SMALL */
} 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);
}
#ifndef SMALL
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)
err(1, "read from routing socket");
else
print_getmsg(&rtm, l);
}
#endif /* SMALL */
#undef rtm
return (0);
}
static void
mask_addr()
{
int olen = so_mask.sa.sa_len;
char *cp1 = olen + (char *)&so_mask, *cp2;
for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
if (*--cp1 != 0) {
so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
break;
}
if ((rtm_addrs & RTA_DST) == 0)
return;
switch (so_dst.sa.sa_family) {
case AF_NS:
case AF_INET:
case AF_CCITT:
case AF_APPLETALK:
case 0:
return;
case AF_ISO:
olen = MIN(so_dst.siso.siso_nlen,
MAX(so_mask.sa.sa_len - 6, 0));
break;
}
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;
break;
}
}
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",
"RTM_RESOLVE: Route created by cloning",
"RTM_NEWADDR: address being added to iface",
"RTM_DELADDR: address being removed from iface",
"RTM_IFINFO: iface status change",
0,
};
char metricnames[] =
"\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu";
char routeflags[] =
"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\017PROTO2\020PROTO1";
char ifnetflags[] =
"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST";
char addrnames[] =
"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
static void
print_rtmsg(rtm, msglen)
struct rt_msghdr *rtm;
int msglen;
{
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
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: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen);
switch (rtm->rtm_type) {
case RTM_IFINFO:
ifm = (struct if_msghdr *)rtm;
(void) printf("if# %d, flags:", ifm->ifm_index);
bprintf(stdout, ifm->ifm_flags, ifnetflags);
pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
break;
case RTM_NEWADDR:
case RTM_DELADDR:
ifam = (struct ifa_msghdr *)rtm;
(void) printf("metric %d, flags:", ifam->ifam_metric);
bprintf(stdout, ifam->ifam_flags, routeflags);
pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
break;
default:
(void) printf("pid: %d, seq %d, errno %d, flags:",
rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
bprintf(stdout, rtm->rtm_flags, routeflags);
pmsg_common(rtm);
}
}
#ifndef SMALL
static void
print_getmsg(rtm, msglen)
struct rt_msghdr *rtm;
int msglen;
{
struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
struct sockaddr_dl *ifp = NULL;
struct sockaddr *sa;
char *cp;
int i;
(void) printf(" route to: %s\n",
routename((struct sockaddr *) &so_dst));
if (rtm->rtm_version != RTM_VERSION) {
warnx("routing message version %d not understood",
rtm->rtm_version);
return;
}
if (rtm->rtm_msglen > msglen) {
warnx("message length mismatch, in packet %d, returned %d\n",
rtm->rtm_msglen, msglen);
}
if (rtm->rtm_errno) {
warn("RTM_GET");
return;
}
cp = ((char *)(rtm + 1));
if (rtm->rtm_addrs)
for (i = 1; i; i <<= 1)
if (i & rtm->rtm_addrs) {
sa = (struct sockaddr *)cp;
switch (i) {
case RTA_DST:
dst = sa;
break;
case RTA_GATEWAY:
gate = sa;
break;
case RTA_NETMASK:
mask = sa;
break;
case RTA_IFP:
if (sa->sa_family == AF_LINK &&
((struct sockaddr_dl *)sa)->sdl_nlen)
ifp = (struct sockaddr_dl *)sa;
break;
}
ADVANCE(cp, sa);
}
if (dst && mask)
mask->sa_family = dst->sa_family; /* XXX */
if (dst)
(void)printf("destination: %s\n", routename(dst));
if (mask) {
int savenflag = nflag;
nflag = 1;
(void)printf(" mask: %s\n", routename(mask));
nflag = savenflag;
}
if (gate && rtm->rtm_flags & RTF_GATEWAY)
(void)printf(" gateway: %s\n", routename(gate));
if (ifp)
(void)printf(" interface: %.*s\n",
ifp->sdl_nlen, ifp->sdl_data);
(void)printf(" flags: ");
bprintf(stdout, rtm->rtm_flags, routeflags);
#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
#define msec(u) (((u) + 500) / 1000) /* usec to msec */
(void) printf("\n%s\n", "\
recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire");
printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
if (rtm->rtm_rmx.rmx_expire)
rtm->rtm_rmx.rmx_expire -= time(0);
printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
#undef lock
#undef msec
#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
if (verbose)
pmsg_common(rtm);
else if (rtm->rtm_addrs &~ RTA_IGN) {
(void) printf("sockaddrs: ");
bprintf(stdout, rtm->rtm_addrs, addrnames);
putchar('\n');
}
#undef RTA_IGN
}
#endif /* SMALL */
void
pmsg_common(rtm)
struct rt_msghdr *rtm;
{
(void) printf("\nlocks: ");
bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
(void) printf(" inits: ");
bprintf(stdout, rtm->rtm_inits, metricnames);
pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
}
static void
pmsg_addrs(cp, addrs)
char *cp;
int addrs;
{
struct sockaddr *sa;
int i;
if (addrs == 0)
return;
(void) printf("\nsockaddrs: ");
bprintf(stdout, addrs, addrnames);
(void) putchar('\n');
for (i = 1; i; i <<= 1)
if (i & addrs) {
sa = (struct sockaddr *)cp;
(void) printf(" %s", routename(sa));
ADVANCE(cp, sa);
}
(void) putchar('\n');
(void) fflush(stdout);
}
static void
bprintf(fp, b, s)
FILE *fp;
int b;
u_char *s;
{
int i;
int gotsome = 0;
if (b == 0)
return;
while ((i = *s++) != 0) {
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);
}
static int
keyword(cp)
char *cp;
{
struct keytab *kt = keywords;
while (kt->kt_cp && strcmp(kt->kt_cp, cp))
kt++;
return kt->kt_i;
}
static void
sodump(su, which)
sup su;
char *which;
{
switch (su->sa.sa_family) {
case AF_INET:
(void) printf("%s: inet %s; ",
which, inet_ntoa(su->sin.sin_addr));
break;
case AF_APPLETALK:
(void) printf("%s: atalk %d.%d; ",
which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node);
break;
case AF_LINK:
(void) printf("%s: link %s; ",
which, link_ntoa(&su->sdl));
break;
#ifndef SMALL
case AF_ISO:
(void) printf("%s: iso %s; ",
which, iso_ntoa(&su->siso.siso_addr));
break;
case AF_NS:
(void) printf("%s: xns %s; ",
which, ns_ntoa(su->sns.sns_addr));
break;
#endif /* SMALL */
default:
(void) printf("af %p: %s; ",
which, any_ntoa(&su->sa));
}
(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)
static void
sockaddr(addr, sa)
char *addr;
struct sockaddr *sa;
{
char *cp = (char *)sa;
int size = sa->sa_len;
char *cplim = cp + size;
int byte = 0, state = VIRGIN, new = 0;
(void) memset(cp, 0, size);
cp++;
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;
}