/
route.c
2040 lines (1897 loc) · 46.9 KB
/
route.c
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/* $NetBSD: route.c,v 1.118 2008/09/10 01:56:22 dyoung 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. 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\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: route.c,v 1.118 2008/09/10 01:56:22 dyoung 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 <net80211/ieee80211_netbsd.h>
#include <netinet/in.h>
#include <netatalk/at.h>
#include <netiso/iso.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"
union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
struct sockaddr_at sat;
struct sockaddr_dl sdl;
#ifndef SMALL
struct sockaddr_iso siso;
#endif /* SMALL */
};
typedef union sockunion *sup;
struct sou {
union sockunion so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
};
static char *any_ntoa(const struct sockaddr *);
static const char *route_strerror(int);
static void set_metric(const char *, int);
static int newroute(int, char *const *);
static void inet_makenetandmask(u_int32_t, struct sockaddr_in *, struct sou *);
#ifdef INET6
static int inet6_makenetandmask(const struct sockaddr_in6 *, struct sou *);
#endif
static int getaddr(int, const char *, struct hostent **, struct sou *);
static int flushroutes(int, char *const [], int);
static int prefixlen(const char *, struct sou *);
#ifndef SMALL
static void interfaces(void);
static void monitor(void);
static int print_getmsg(struct rt_msghdr *, int, struct sou *);
static const char *linkstate(struct if_msghdr *);
#endif /* SMALL */
static int rtmsg(int, int, struct sou *);
static void mask_addr(struct sou *);
static void print_rtmsg(struct rt_msghdr *, int);
static void pmsg_common(struct rt_msghdr *);
static void pmsg_addrs(const char *, int);
static void bprintf(FILE *, int, const char *);
static void sodump(sup, const char *);
static void sockaddr(const char *, struct sockaddr *);
int pid, rtm_addrs;
int sock;
int forcehost, forcenet, doflush, nflag, af, qflag, tflag, Sflag;
int iflag, verbose, aflen = sizeof(struct sockaddr_in);
int locking, lockrest, debugonly, shortoutput;
struct rt_metrics rt_metrics;
u_int32_t rtm_inits;
short ns_nullh[] = {0,0,0};
short ns_bh[] = {-1,-1,-1};
void
usage(const char *cp)
{
if (cp)
warnx("botched keyword: %s", cp);
(void)fprintf(stderr,
"Usage: %s [ -fnqSsv ] cmd [[ -<qualifers> ] args ]\n",
getprogname());
exit(1);
/* NOTREACHED */
}
#define PRIETHER "02x:%02x:%02x:%02x:%02x:%02x"
#define PRIETHER_ARGS(__enaddr) (__enaddr)[0], (__enaddr)[1], (__enaddr)[2], \
(__enaddr)[3], (__enaddr)[4], (__enaddr)[5]
#define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
int
main(int argc, char * const *argv)
{
int ch;
if (argc < 2)
usage(NULL);
while ((ch = getopt(argc, argv, "dfnqSstv")) != -1)
switch (ch) {
case 'd':
debugonly = 1;
break;
case 'f':
doflush = 1;
break;
case 'n':
nflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'S':
Sflag = 1;
break;
case 's':
shortoutput = 1;
break;
case 't':
tflag = 1;
break;
case 'v':
verbose = 1;
break;
case '?':
default:
usage(NULL);
/*NOTREACHED*/
}
argc -= optind;
argv += optind;
pid = getpid();
if (tflag)
sock = open("/dev/null", O_WRONLY, 0);
else
sock = socket(PF_ROUTE, SOCK_RAW, 0);
if (sock < 0)
err(EXIT_FAILURE, "socket");
if (*argv == NULL) {
if (doflush)
ch = K_FLUSH;
else
goto no_cmd;
} else
ch = keyword(*argv);
switch (ch) {
#ifndef SMALL
case K_GET:
#endif /* SMALL */
case K_CHANGE:
case K_ADD:
case K_DELETE:
if (doflush)
(void)flushroutes(1, argv, 0);
return newroute(argc, argv);
case K_SHOW:
show(argc, argv);
return 0;
#ifndef SMALL
case K_MONITOR:
monitor();
return 0;
#endif /* SMALL */
case K_FLUSH:
return flushroutes(argc, argv, 0);
case K_FLUSHALL:
return flushroutes(argc, argv, 1);
no_cmd:
default:
usage(*argv);
/*NOTREACHED*/
}
}
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
static int
flushroutes(int argc, char * const argv[], int doall)
{
struct sockaddr *sa;
size_t needed;
int flags, mib[6], rlen, seqno;
char *buf, *next, *lim;
const char *afname;
struct rt_msghdr *rtm;
flags = 0;
af = AF_UNSPEC;
shutdown(sock, SHUT_RD); /* Don't want to read back our messages */
parse_show_opts(argc, argv, &af, &flags, &afname, false);
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(EXIT_FAILURE, "route-sysctl-estimate");
buf = lim = NULL;
if (needed) {
if ((buf = malloc(needed)) == NULL)
err(EXIT_FAILURE, "malloc");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(EXIT_FAILURE, "actual retrieval of routing table");
lim = buf + needed;
}
if (verbose) {
(void)printf("Examining routing table from sysctl\n");
if (af != AF_UNSPEC)
printf("(address family %s)\n", afname);
}
if (needed == 0)
return 0;
seqno = 0; /* ??? */
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
sa = (struct sockaddr *)(rtm + 1);
if (verbose)
print_rtmsg(rtm, rtm->rtm_msglen);
if ((rtm->rtm_flags & flags) != flags)
continue;
if (!(rtm->rtm_flags & (RTF_GATEWAY | RTF_STATIC |
RTF_LLINFO)) && !doall)
continue;
if (af != AF_UNSPEC && sa->sa_family != af)
continue;
if (debugonly)
continue;
rtm->rtm_type = RTM_DELETE;
rtm->rtm_seq = seqno;
if ((rlen = write(sock, next, rtm->rtm_msglen)) < 0) {
warnx("writing to routing socket: %s",
route_strerror(errno));
return 1;
}
if (rlen < (int)rtm->rtm_msglen) {
warnx("write to routing socket, got %d for rlen", rlen);
return 1;
}
seqno++;
if (qflag)
continue;
if (verbose)
print_rtmsg(rtm, rlen);
else {
(void)printf("%-20.20s ",
routename(sa, NULL, rtm->rtm_flags));
sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) +
(char *)sa);
(void)printf("%-20.20s ",
routename(sa, NULL, RTF_HOST));
(void)printf("done\n");
}
}
free(buf);
return 0;
}
static char hexlist[] = "0123456789abcdef";
static char *
any_ntoa(const struct sockaddr *sa)
{
static char obuf[3 * 256];
const char *in;
char *out;
int len;
#if __GNUC__ > 2
len = sa->sa_len - offsetof(struct sockaddr, sa_data);
#else
len = sa->sa_len - ((struct sockaddr*)&sa->sa_data - sa);
#endif
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;
}
int
netmask_length(struct sockaddr *nm, int family)
{
static int
/* number of bits in a nibble */
_t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 },
/* good nibbles are 1111, 1110, 1100, 1000, 0000 */
_g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 };
int mask, good, zeroes, maskbytes, bit, i;
unsigned char *maskdata;
if (nm == NULL)
return 0;
mask = 0;
good = 1;
zeroes = 0;
switch (family) {
case AF_INET: {
struct sockaddr_in *nsin = (struct sockaddr_in *)nm;
maskdata = (unsigned char *)&nsin->sin_addr;
maskbytes = nsin->sin_len -
((caddr_t)&nsin->sin_addr - (caddr_t)nsin);
break;
}
case AF_INET6: {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm;
maskdata = (unsigned char *)&sin6->sin6_addr;
maskbytes = sin6->sin6_len -
((caddr_t)&sin6->sin6_addr - (caddr_t)sin6);
break;
}
default:
return 0;
}
/*
* Count the bits in the nibbles of the mask, and marking the
* netmask as not good (or at best, non-standard and very
* discouraged, in the case of AF_INET) if we find either of
* a nibble with non-contiguous bits, or a non-zero nibble
* after we've found a zero nibble.
*/
for (i = 0; i < maskbytes; i++) {
/* high nibble */
mask += bit = _t[maskdata[i] >> 4];
good &= _g[maskdata[i] >> 4];
if (zeroes && bit)
good = 0;
if (bit == 0)
zeroes = 1;
/* low nibble */
mask += bit = _t[maskdata[i] & 0xf];
good &= _g[maskdata[i] & 0xf];
if (zeroes && bit)
good = 0;
if (bit == 0)
zeroes = 1;
}
/*
* Always return the number of bits found, but as a negative
* if the mask wasn't one we like.
*/
return good ? mask : -mask;
}
char *
netmask_string(const struct sockaddr *mask, int len, int family)
{
static char smask[INET6_ADDRSTRLEN];
struct sockaddr_in nsin;
struct sockaddr_in6 nsin6;
if (len >= 0)
snprintf(smask, sizeof(smask), "%d", len);
else {
switch (family) {
case AF_INET:
memset(&nsin, 0, sizeof(nsin));
memcpy(&nsin, mask, mask->sa_len);
snprintf(smask, sizeof(smask), "%s",
inet_ntoa(nsin.sin_addr));
break;
case AF_INET6:
memset(&nsin6, 0, sizeof(nsin6));
memcpy(&nsin6, mask, mask->sa_len);
inet_ntop(family, &nsin6.sin6_addr, smask,
sizeof(smask));
break;
default:
snprintf(smask, sizeof(smask), "%s", any_ntoa(mask));
}
}
return smask;
}
const char *
routename(const struct sockaddr *sa, struct sockaddr *nm, int flags)
{
const char *cp;
static char line[50];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
struct in_addr in;
int nml;
if ((flags & RTF_HOST) == 0)
return netname(sa, nm);
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = strchr(domain, '.')))
(void)strlcpy(domain, cp + 1, sizeof(domain));
else
domain[0] = 0;
}
if (sa->sa_len == 0)
strlcpy(line, "default", sizeof(line));
else switch (sa->sa_family) {
case AF_INET:
in = ((const struct sockaddr_in *)sa)->sin_addr;
nml = netmask_length(nm, AF_INET);
cp = 0;
if (in.s_addr == INADDR_ANY || sa->sa_len < 4) {
if (nml == 0)
cp = "default";
else {
static char notdefault[sizeof(NOTDEFSTRING)];
snprintf(notdefault, sizeof(notdefault),
"0.0.0.0/%s",
netmask_string(nm, nml, AF_INET));
cp = notdefault;
}
}
if (cp == 0 && !nflag) {
hp = gethostbyaddr((char *)&in, sizeof(struct in_addr),
AF_INET);
if (hp) {
char *ccp;
if ((ccp = strchr(hp->h_name, '.')) &&
!strcmp(ccp + 1, domain))
*ccp = '\0';
cp = hp->h_name;
}
}
if (cp)
(void)strlcpy(line, cp, sizeof(line));
else
(void)strlcpy(line, inet_ntoa(in), sizeof(line));
break;
case AF_LINK:
return link_ntoa((const struct sockaddr_dl *)sa);
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 sin6;
int niflags;
char nihost[NI_MAXHOST];
niflags = 0;
if (nflag)
niflags |= NI_NUMERICHOST;
memset(&sin6, 0, sizeof(sin6));
memcpy(&sin6, sa, sa->sa_len);
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_family = AF_INET6;
#ifdef __KAME__
if (sa->sa_len == sizeof(struct sockaddr_in6) &&
(IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
sin6.sin6_scope_id == 0) {
sin6.sin6_scope_id =
ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
sin6.sin6_addr.s6_addr[2] = 0;
sin6.sin6_addr.s6_addr[3] = 0;
}
#endif
nml = netmask_length(nm, AF_INET6);
if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
if (nml == 0)
strlcpy(line, "::", sizeof(line));
else
/* noncontiguous never happens in ipv6 */
snprintf(line, sizeof(line), "::/%d", nml);
}
else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
nihost, sizeof(nihost), NULL, 0, niflags) != 0)
strlcpy(line, "invalid", sizeof(line));
else {
char *ccp;
if (!nflag && (ccp = strchr(nihost, '.')) &&
strcmp(ccp + 1, domain) == 0)
*ccp = '\0';
strlcpy(line, nihost, sizeof(line));
}
break;
}
#endif
#ifndef SMALL
case AF_ISO:
(void)snprintf(line, sizeof line, "iso %s",
iso_ntoa(&((const struct sockaddr_iso *)sa)->siso_addr));
break;
case AF_APPLETALK:
(void)snprintf(line, sizeof(line), "atalk %d.%d",
((const struct sockaddr_at *)sa)->sat_addr.s_net,
((const 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.
*/
const char *
netname(const struct sockaddr *sa, struct sockaddr *nm)
{
const char *cp = 0;
static char line[50];
struct netent *np = 0;
u_int32_t net, mask;
u_int32_t i;
int subnetshift, nml;
struct in_addr in;
switch (sa->sa_family) {
case AF_INET:
in = ((const struct sockaddr_in *)sa)->sin_addr;
i = ntohl(in.s_addr);
nml = netmask_length(nm, AF_INET);
if (i == 0) {
if (nml == 0)
cp = "default";
else {
static char notdefault[sizeof(NOTDEFSTRING)];
snprintf(notdefault, sizeof(notdefault),
"0.0.0.0/%s",
netmask_string(nm, nml, AF_INET));
cp = notdefault;
}
}
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)strlcpy(line, cp, sizeof(line));
else {
if (nml == 0)
strlcpy(line, inet_ntoa(in), sizeof(line));
else if (nml < 0) {
snprintf(line, sizeof(line), "%s&%s",
inet_ntoa(in),
netmask_string(nm, nml, AF_INET));
} else {
snprintf(line, sizeof(line), "%s/%d",
inet_ntoa(in), nml);
}
}
break;
case AF_LINK:
return link_ntoa((const struct sockaddr_dl *)sa);
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 sin6;
int niflags;
niflags = 0;
if (nflag)
niflags |= NI_NUMERICHOST;
memset(&sin6, 0, sizeof(sin6));
memcpy(&sin6, sa, sa->sa_len);
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_family = AF_INET6;
#ifdef __KAME__
if (sa->sa_len == sizeof(struct sockaddr_in6) &&
(IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
sin6.sin6_scope_id == 0) {
sin6.sin6_scope_id =
ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
sin6.sin6_addr.s6_addr[2] = 0;
sin6.sin6_addr.s6_addr[3] = 0;
}
#endif
nml = netmask_length(nm, AF_INET6);
if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
if (nml == 0)
strlcpy(line, "::", sizeof(line));
else
/* noncontiguous never happens in ipv6 */
snprintf(line, sizeof(line), "::/%d", nml);
}
else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
line, sizeof(line), NULL, 0, niflags) != 0)
strlcpy(line, "invalid", sizeof(line));
break;
}
#endif
#ifndef SMALL
case AF_ISO:
(void)snprintf(line, sizeof line, "iso %s",
iso_ntoa(&((const struct sockaddr_iso *)sa)->siso_addr));
break;
case AF_APPLETALK:
(void)snprintf(line, sizeof(line), "atalk %d.%d",
((const struct sockaddr_at *)sa)->sat_addr.s_net,
((const 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 const char *
route_strerror(int error)
{
switch (error) {
case ESRCH:
return "not in table";
case EBUSY:
return "entry in use";
case ENOBUFS:
return "routing table overflow";
default:
return strerror(error);
}
}
static void
set_metric(const 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 int
newroute(int argc, char *const *argv)
{
const char *cmd, *dest = "", *gateway = "";
int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
int key;
struct hostent *hp = 0;
struct sou sou, *soup = &sou;
memset(&sou, 0, sizeof(sou));
cmd = argv[0];
af = AF_UNSPEC;
if (*cmd != 'g')
shutdown(sock, SHUT_RD); /* 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;
#ifndef SMALL
case K_ATALK:
af = AF_APPLETALK;
aflen = sizeof(struct sockaddr_at);
break;
#endif
case K_INET:
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
break;
#ifdef INET6
case K_INET6:
af = AF_INET6;
aflen = sizeof(struct sockaddr_in6);
break;
#endif
case K_LINK:
af = AF_LINK;
aflen = sizeof(struct sockaddr_dl);
break;
#ifndef SMALL
case K_OSI:
case K_ISO:
af = AF_ISO;
aflen = sizeof(struct sockaddr_iso);
break;
#endif /* SMALL */
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_CLONED:
flags |= RTF_CLONED;
break;
case K_NOCLONED:
flags &= ~RTF_CLONED;
break;
case K_PROTO1:
flags |= RTF_PROTO1;
break;
case K_PROTO2:
flags |= RTF_PROTO2;
break;
case K_CLONING:
flags |= RTF_CLONING;
break;
case K_NOCLONING:
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, soup);
break;
case K_IFP:
if (!--argc)
usage(1+*argv);
(void)getaddr(RTA_IFP, *++argv, 0, soup);
break;
case K_GENMASK:
if (!--argc)
usage(1+*argv);
(void)getaddr(RTA_GENMASK, *++argv, 0, soup);
break;
case K_GATEWAY:
if (!--argc)
usage(1+*argv);
(void)getaddr(RTA_GATEWAY, *++argv, 0, soup);
break;
case K_DST:
if (!--argc)
usage(1+*argv);
ishost = getaddr(RTA_DST, *++argv, &hp, soup);
dest = *argv;
break;
case K_NETMASK:
if (!--argc)
usage(1+*argv);
(void)getaddr(RTA_NETMASK, *++argv, 0, soup);
/* FALLTHROUGH */
case K_NET:
forcenet++;
break;
case K_PREFIXLEN:
if (!--argc)
usage(1+*argv);
ishost = prefixlen(*++argv, soup);
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, soup);
} else if ((rtm_addrs & RTA_GATEWAY) == 0) {
gateway = *argv;
(void)getaddr(RTA_GATEWAY, *argv, &hp, soup);
} else {
ret = atoi(*argv);
if (ret == 0) {
if (strcmp(*argv, "0") == 0) {
if (!qflag) {
warnx("%s, %s",
"old usage of trailing 0",
"assuming route to if");
}
} else
usage(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, soup);
}
}
}
if (forcehost && forcenet)
errx(EXIT_FAILURE, "-host and -net conflict");
else if (forcehost)
ishost = 1;
else 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, soup)) == 0)
break;
if (errno != ENETUNREACH && errno != ESRCH)
break;
if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
hp->h_addr_list++;
memmove(&soup->so_gate.sin.sin_addr, hp->h_addr_list[0],
hp->h_length);
} else
break;
}
if (*cmd == 'g')
return ret != 0;
if (!qflag) {
oerrno = errno;
(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(soup->so_gate.sin.sin_addr));
}
if (ret == 0)
(void)printf("\n");
else
(void)printf(": %s\n", route_strerror(oerrno));
}