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77f96119f9
NetBSD/sbin/route/route.c
christos 77f96119f9 avoid pointer gymnastics
2013-10-18 21:01:00 +00:00

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/* $NetBSD: route.c,v 1.141 2013/10/18 21:01:00 christos 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 1.141 2013/10/18 21:01:00 christos 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 <netmpls/mpls.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"
#include "prog_ops.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_mpls smpls;
#endif /* SMALL */
struct sockaddr_storage sstorage;
};
typedef union sockunion *sup;
struct sou {
union sockunion *so_dst, *so_gate, *so_mask, *so_genmask, *so_ifa,
*so_ifp, *so_mpls;
};
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);
__dead static void monitor(void);
static int print_getmsg(struct rt_msghdr *, int, struct sou *);
static const char *linkstate(struct if_msghdr *);
static sup readtag(sup, const char *);
static void addtag(sup, const char *, int);
#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), rtag;
int locking, lockrest, debugonly, shortoutput;
struct rt_metrics rt_metrics;
int 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]
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;
if (prog_init && prog_init() == -1)
err(1, "init failed");
pid = prog_getpid();
if (tflag)
sock = prog_open("/dev/null", O_WRONLY, 0);
else
sock = prog_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;
/* Don't want to read back our messages */
prog_shutdown(sock, SHUT_RD);
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 (prog_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 (prog_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 = prog_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 *)(RT_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) {
uint16_t scope;
memcpy(&scope, &sin6.sin6_addr.s6_addr[2],
sizeof(scope));
sin6.sin6_scope_id = ntohs(scope);
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_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;
case AF_MPLS:
{
union mpls_shim ms;
const union mpls_shim *pms;
size_t psize = sizeof(struct sockaddr_mpls), len;
ms.s_addr =((const struct sockaddr_mpls*)sa)->smpls_addr.s_addr;
ms.s_addr = ntohl(ms.s_addr);
len = snprintf(line, sizeof(line), "%u", ms.shim.label);
if (len >= sizeof(line))
errx(1, "snprintf");
pms = &((const struct sockaddr_mpls*)sa)->smpls_addr;
while (psize < sa->sa_len) {
size_t alen;
pms++;
ms.s_addr = ntohl(pms->s_addr);
alen = snprintf(line + len, sizeof(line) - len, " %u",
ms.shim.label);
if (alen >= sizeof(line) - len)
errx(1, "snprintf");
len += alen;
psize += sizeof(ms);
}
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) {
uint16_t scope;
memcpy(&scope, &sin6.sin6_addr.s6_addr[2],
sizeof(scope));
sin6.sin6_scope_id = ntohs(scope);
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_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;
uint64_t noval, *valp = &noval;
switch (key) {
#define caseof(x, y, z) \
case x: valp = (uint64_t *)&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 = strtoul(value, NULL, 0);
}
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;
sou.so_dst = calloc(1, sizeof(union sockunion));
sou.so_gate = calloc(1, sizeof(union sockunion));
sou.so_mask = calloc(1, sizeof(union sockunion));
sou.so_genmask = calloc(1, sizeof(union sockunion));
sou.so_ifa = calloc(1, sizeof(union sockunion));
sou.so_ifp = calloc(1, sizeof(union sockunion));
sou.so_mpls = calloc(1, sizeof(union sockunion));
if (sou.so_dst == NULL || sou.so_gate == NULL || sou.so_mask == NULL ||
sou.so_genmask == NULL || sou.so_ifa == NULL || sou.so_ifp == NULL ||
sou.so_mpls == NULL)
errx(EXIT_FAILURE, "Cannot allocate memory");
cmd = argv[0];
af = AF_UNSPEC;
if (*cmd != 'g') {
/* Don't want to read back our messages */
prog_shutdown(sock, SHUT_RD);
}
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_MPLS:
af = AF_MPLS;
aflen = sizeof(struct sockaddr_mpls);
break;
case K_TAG:
if (!--argc)
usage(1+*argv);
af = AF_MPLS;
aflen = sizeof(struct sockaddr_mpls);
(void)getaddr(RTA_TAG, *++argv, 0, soup);
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_NOREJECT:
flags &= ~RTF_REJECT;
break;
case K_BLACKHOLE:
flags |= RTF_BLACKHOLE;
break;
case K_NOBLACKHOLE:
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_PROXY:
flags |= RTF_ANNOUNCE;
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 ((rtm_addrs & RTA_DST) == 0)
errx(EXIT_FAILURE, "missing destination specification");
if (*cmd == 'a' && (rtm_addrs & RTA_GATEWAY) == 0)
errx(EXIT_FAILURE, "missing gateway specification");
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));
}
free(sou.so_dst);
free(sou.so_gate);
free(sou.so_mask);
free(sou.so_genmask);
free(sou.so_ifa);
free(sou.so_ifp);
free(sou.so_mpls);
return ret != 0;
}
static void
inet_makenetandmask(const u_int32_t net, struct sockaddr_in * const isin,
struct sou *soup)
{
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 < 192) {
addr = net << IN_CLASSA_NSHIFT;
mask = IN_CLASSB_NET;
} else if (net < 224) {
addr = net << IN_CLASSA_NSHIFT;
mask = IN_CLASSC_NET;
} else if (net < 256) {
addr = net << IN_CLASSA_NSHIFT;
mask = IN_CLASSD_NET;
} else if (net < 49152) { /* 192 * 256 */
addr = net << IN_CLASSB_NSHIFT;
mask = IN_CLASSB_NET;
} else if (net < 57344) { /* 224 * 256 */
addr = net << IN_CLASSB_NSHIFT;
mask = IN_CLASSC_NET;
} else if (net < 65536) {
addr = net << IN_CLASSB_NSHIFT;
mask = IN_CLASSB_NET;
} else if (net < 14680064L) { /* 224 * 65536 */
addr = net << IN_CLASSC_NSHIFT;
mask = IN_CLASSC_NET;
} else if (net < 16777216L) {
addr = net << IN_CLASSC_NSHIFT;
mask = IN_CLASSD_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;
}
isin->sin_addr.s_addr = htonl(addr);
sin = &soup->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;
sin->sin_family = AF_INET;
}
#ifdef INET6
/*
* XXX the function may need more improvement...
*/
static int
inet6_makenetandmask(const struct sockaddr_in6 * const sin6, struct sou *soup)
{
const char *plen;
struct in6_addr in6;
plen = NULL;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
sin6->sin6_scope_id == 0) {
plen = "0";
} else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
/* aggregatable global unicast - RFC2374 */
memset(&in6, 0, sizeof(in6));
if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8))
plen = "64";
}
if (!plen || strcmp(plen, "128") == 0)
return 1;
else {
rtm_addrs |= RTA_NETMASK;
(void)prefixlen(plen, soup);
return 0;
}
}
#endif
/*
* Interpret an argument as a network address of some kind,
* returning 1 if a host address, 0 if a network address.
*/
static int
getaddr(int which, const char *s, struct hostent **hpp, struct sou *soup)
{
sup su;
struct hostent *hp;
struct netent *np;
u_int32_t val;
char *t;
int afamily; /* local copy of af so we can change it */
if (af == AF_UNSPEC) {
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
}
afamily = af;
rtm_addrs |= which;
switch (which) {
case RTA_DST:
su = soup->so_dst;
break;
case RTA_GATEWAY:
su = soup->so_gate;
break;
case RTA_NETMASK:
su = soup->so_mask;
break;
case RTA_GENMASK:
su = soup->so_genmask;
break;
case RTA_IFP:
su = soup->so_ifp;
afamily = AF_LINK;
break;
case RTA_IFA:
su = soup->so_ifa;
su->sa.sa_family = af;
break;
#ifndef SMALL
case RTA_TAG:
su = soup->so_mpls;
afamily = AF_MPLS;
break;
#endif
default:
su = NULL;
usage("Internal Error");
/*NOTREACHED*/
}
su->sa.sa_len = aflen;
su->sa.sa_family = afamily; /* cases that don't want it have left already */
if (strcmp(s, "default") == 0) {
switch (which) {
case RTA_DST:
forcenet++;
(void)getaddr(RTA_NETMASK, s, 0, soup);
break;
case RTA_NETMASK:
case RTA_GENMASK:
su->sa.sa_len = 0;
}
return 0;
}
switch (afamily) {
#ifdef INET6
case AF_INET6:
{
struct addrinfo hints, *res;
char *slash = 0;
if (which == RTA_DST && (slash = (strrchr(s, '/'))) != 0)
*slash = '\0';
memset(&hints, 0, sizeof(hints));
hints.ai_family = afamily; /*AF_INET6*/
hints.ai_flags = AI_NUMERICHOST;
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
if (getaddrinfo(s, "0", &hints, &res) != 0) {
hints.ai_flags = 0;
if (slash) {
*slash = '/';
slash = 0;
}
if (getaddrinfo(s, "0", &hints, &res) != 0)
errx(EXIT_FAILURE, "%s: bad value", s);
}
if (slash)
*slash = '/';
if (sizeof(su->sin6) != res->ai_addrlen)
errx(EXIT_FAILURE, "%s: bad value", s);
if (res->ai_next) {
errx(EXIT_FAILURE,
"%s: address resolved to multiple values", s);
}
memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
freeaddrinfo(res);
#ifdef __KAME__
if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) &&
su->sin6.sin6_scope_id) {
uint16_t scope;
scope = htons(su->sin6.sin6_scope_id);
memcpy(&su->sin6.sin6_addr.s6_addr[2], &scope,
sizeof(scope));
su->sin6.sin6_scope_id = 0;
}
#endif
if (hints.ai_flags == AI_NUMERICHOST) {
if (slash)
return prefixlen(slash + 1, soup);
if (which == RTA_DST)
return inet6_makenetandmask(&su->sin6, soup);
return 0;
} else
return 1;
}
#endif
case PF_ROUTE:
su->sa.sa_len = sizeof(*su);
sockaddr(s, &su->sa);
return 1;
#ifndef SMALL
case AF_APPLETALK:
t = strchr (s, '.');
if (!t) {
badataddr:
errx(EXIT_FAILURE, "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_MPLS:
if (which == RTA_DST)
soup->so_dst = readtag(su, s);
else if (which == RTA_TAG)
soup->so_mpls = readtag(su, s);
else
errx(EXIT_FAILURE, "MPLS can be used only as "
"DST or TAG");
return 1;
#endif
case AF_LINK:
link_addr(s, &su->sdl);
return 1;
case AF_INET:
default:
break;
}
if (hpp == NULL)
hpp = &hp;
*hpp = NULL;
if ((t = strchr(s, '/')) != NULL && which == RTA_DST) {
*t = '\0';
if (forcenet == 0) {
if ((val = inet_addr(s)) != INADDR_NONE) {
inet_makenetandmask(htonl(val), &su->sin, soup);
return prefixlen(&t[1], soup);
}
} else {
if ((val = inet_network(s)) != INADDR_NONE) {
inet_makenetandmask(val, &su->sin, soup);
return prefixlen(&t[1], soup);
}
}
*t = '/';
}
if (inet_aton(s, &su->sin.sin_addr) &&
(which != RTA_DST || forcenet == 0)) {
val = su->sin.sin_addr.s_addr;
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, soup);
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(EXIT_FAILURE, "%s: bad value", s);
/*NOTREACHED*/
}
#ifndef SMALL
static sup
readtag(sup su, const char *s)
{
char *p, *n, *norig;
int mplssize = 0;
sup retsu = su;
n = strdup(s);
if (n == NULL)
errx(EXIT_FAILURE, "%s: Cannot allocate memory", s);
norig = n;
for (uint i = 0; i < strlen(n); i++)
if(n[i] == ',')
mplssize++;
#define MPLS_NEW_SIZE (sizeof(struct sockaddr_mpls) + \
mplssize * sizeof(union mpls_shim))
if (mplssize != 0 && sizeof(union sockunion) < MPLS_NEW_SIZE) {
free(su);
retsu = malloc(MPLS_NEW_SIZE);
retsu->smpls.smpls_family = AF_MPLS;
}
retsu->smpls.smpls_len = MPLS_NEW_SIZE;
mplssize = 0;
while ((p = strchr(n, ',')) != NULL) {
p[0] = '\0';
addtag(retsu, n, mplssize);
n = p + 1;
mplssize++;
}
addtag(retsu, n, mplssize);
free(norig);
return retsu;
}
static void
addtag(sup su, const char *s, int where)
{
union mpls_shim *ms = &su->smpls.smpls_addr;
if (atoi(s) < 0 || atoi(s) >= (1 << 20))
errx(EXIT_FAILURE, "%s: Bad tag", s);
ms[where].s_addr = 0;
ms[where].shim.label = atoi(s);
ms[where].s_addr = htonl(ms[where].s_addr);
}
#endif /* SMALL */
int
prefixlen(const char *s, struct sou *soup)
{
int len = atoi(s), q, r;
int max;
switch (af) {
case AF_INET:
max = sizeof(struct in_addr) * 8;
break;
#ifdef INET6
case AF_INET6:
max = sizeof(struct in6_addr) * 8;
break;
#endif
default:
errx(EXIT_FAILURE, "prefixlen is not supported with af %d", af);
/*NOTREACHED*/
}
rtm_addrs |= RTA_NETMASK;
if (len < -1 || len > max)
errx(EXIT_FAILURE, "%s: bad value", s);
q = len >> 3;
r = len & 7;
switch (af) {
case AF_INET:
memset(soup->so_mask, 0, sizeof(*soup->so_mask));
soup->so_mask->sin.sin_family = AF_INET;
soup->so_mask->sin.sin_len = sizeof(struct sockaddr_in);
soup->so_mask->sin.sin_addr.s_addr = (len == 0 ? 0
: htonl(0xffffffff << (32 - len)));
break;
#ifdef INET6
case AF_INET6:
soup->so_mask->sin6.sin6_family = AF_INET6;
soup->so_mask->sin6.sin6_len = sizeof(struct sockaddr_in6);
memset(&soup->so_mask->sin6.sin6_addr, 0,
sizeof(soup->so_mask->sin6.sin6_addr));
if (q > 0)
memset(&soup->so_mask->sin6.sin6_addr, 0xff, q);
if (r > 0)
*((u_char *)&soup->so_mask->sin6.sin6_addr + q) =
(0xff00 >> r) & 0xff;
break;
#endif
}
return len == max;
}
#ifndef SMALL
static void
interfaces(void)
{
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 (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(EXIT_FAILURE, "route-sysctl-estimate");
if (needed) {
if ((buf = malloc(needed)) == NULL)
err(EXIT_FAILURE, "malloc");
if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
err(EXIT_FAILURE,
"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);
}
free(buf);
}
}
static void
monitor(void)
{
int n;
union {
char msg[2048];
struct rt_msghdr hdr;
} u;
verbose = 1;
if (debugonly) {
interfaces();
exit(0);
}
for(;;) {
time_t now;
n = prog_read(sock, &u, sizeof(u));
now = time(NULL);
(void)printf("got message of size %d on %s", n, ctime(&now));
print_rtmsg(&u.hdr, n);
}
}
#endif /* SMALL */
struct {
struct rt_msghdr m_rtm;
char m_space[512];
} m_rtmsg;
static int
rtmsg(int cmd, int flags, struct sou *soup)
{
static int seq;
int rlen;
char *cp = m_rtmsg.m_space;
int l;
#define NEXTADDR(w, u) \
if (rtm_addrs & (w)) {\
l = RT_ROUNDUP(u->sa.sa_len); memmove(cp, u, l); cp += l;\
if (verbose && ! shortoutput) 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 (soup->so_ifp->sa.sa_family == AF_UNSPEC) {
soup->so_ifp->sa.sa_family = AF_LINK;
soup->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(soup);
NEXTADDR(RTA_DST, soup->so_dst);
NEXTADDR(RTA_GATEWAY, soup->so_gate);
NEXTADDR(RTA_NETMASK, soup->so_mask);
NEXTADDR(RTA_GENMASK, soup->so_genmask);
NEXTADDR(RTA_IFP, soup->so_ifp);
NEXTADDR(RTA_IFA, soup->so_ifa);
#ifndef SMALL
NEXTADDR(RTA_TAG, soup->so_mpls);
#endif
rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
if (verbose && ! shortoutput) {
if (rtm_addrs)
putchar('\n');
print_rtmsg(&rtm, l);
}
if (debugonly)
return 0;
if ((rlen = prog_write(sock, (char *)&m_rtmsg, l)) < 0) {
warnx("writing to routing socket: %s", route_strerror(errno));
return -1;
}
if (rlen < l) {
warnx("write to routing socket, got %d for rlen", rlen);
return 1;
}
#ifndef SMALL
if (cmd == RTM_GET) {
do {
l = prog_read(sock,
(char *)&m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
if (l < 0)
err(EXIT_FAILURE, "read from routing socket");
else
return print_getmsg(&rtm, l, soup);
}
#endif /* SMALL */
#undef rtm
return 0;
}
static void
mask_addr(struct sou *soup)
{
int olen = soup->so_mask->sa.sa_len;
char *cp1 = olen + (char *)soup->so_mask, *cp2;
for (soup->so_mask->sa.sa_len = 0; cp1 > (char *)soup->so_mask; )
if (*--cp1 != 0) {
soup->so_mask->sa.sa_len = 1 + cp1 - (char *)soup->so_mask;
break;
}
if ((rtm_addrs & RTA_DST) == 0)
return;
switch (soup->so_dst->sa.sa_family) {
case AF_INET:
#ifdef INET6
case AF_INET6:
#endif
#ifndef SMALL
case AF_APPLETALK:
#endif /* SMALL */
case 0:
return;
}
cp1 = soup->so_mask->sa.sa_len + 1 + (char *)soup->so_dst;
cp2 = soup->so_dst->sa.sa_len + 1 + (char *)soup->so_dst;
while (cp2 > cp1)
*--cp2 = 0;
cp2 = soup->so_mask->sa.sa_len + 1 + (char *)soup->so_mask;
while (cp1 > soup->so_dst->sa.sa_data)
*--cp1 &= *--cp2;
}
const char * const msgtypes[] = {
[RTM_ADD] = "RTM_ADD: Add Route",
[RTM_DELETE] = "RTM_DELETE: Delete Route",
[RTM_CHANGE] = "RTM_CHANGE: Change Metrics or flags",
[RTM_GET] = "RTM_GET: Report Metrics",
[RTM_LOSING] = "RTM_LOSING: Kernel Suspects Partitioning",
[RTM_REDIRECT] = "RTM_REDIRECT: Told to use different route",
[RTM_MISS] = "RTM_MISS: Lookup failed on this address",
[RTM_LOCK] = "RTM_LOCK: fix specified metrics",
[RTM_OLDADD] = "RTM_OLDADD: caused by SIOCADDRT",
[RTM_OLDDEL] = "RTM_OLDDEL: caused by SIOCDELRT",
[RTM_RESOLVE] = "RTM_RESOLVE: Route created by cloning",
[RTM_NEWADDR] = "RTM_NEWADDR: address being added to iface",
[RTM_DELADDR] = "RTM_DELADDR: address being removed from iface",
[RTM_OOIFINFO] = "RTM_OOIFINFO: iface status change (pre-1.5)",
[RTM_OIFINFO] = "RTM_OIFINFO: iface status change (pre-64bit time)",
[RTM_IFANNOUNCE] = "RTM_IFANNOUNCE: iface arrival/departure",
[RTM_IEEE80211] = "RTM_IEEE80211: IEEE80211 wireless event",
[RTM_IFINFO] = "RTM_IFINFO: iface status change",
[RTM_CHGADDR] = "RTM_CHGADDR: address being changed on iface",
};
const char metricnames[] =
"\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu";
const char routeflags[] =
"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1";
const char ifnetflags[] =
"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST";
const char addrnames[] =
"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD\011TAG";
#ifndef SMALL
static const char *
linkstate(struct if_msghdr *ifm)
{
static char buf[64];
switch (ifm->ifm_data.ifi_link_state) {
case LINK_STATE_UNKNOWN:
return "carrier: unknown";
case LINK_STATE_DOWN:
return "carrier: no carrier";
case LINK_STATE_UP:
return "carrier: active";
default:
(void)snprintf(buf, sizeof(buf), "carrier: 0x%x",
ifm->ifm_data.ifi_link_state);
return buf;
}
}
#endif /* SMALL */
static void
print_rtmsg(struct rt_msghdr *rtm, int msglen)
{
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
struct if_announcemsghdr *ifan;
union {
struct ieee80211_join_event join;
struct ieee80211_leave_event leave;
struct ieee80211_replay_event replay;
struct ieee80211_michael_event michael;
} ev;
size_t evlen = 0;
if (verbose == 0)
return;
if (rtm->rtm_version != RTM_VERSION) {
(void)printf("routing message version %d not understood\n",
rtm->rtm_version);
return;
}
if (msgtypes[rtm->rtm_type])
(void)printf("%s: ", msgtypes[rtm->rtm_type]);
else
(void)printf("#%d: ", rtm->rtm_type);
(void)printf("len %d, ", rtm->rtm_msglen);
switch (rtm->rtm_type) {
case RTM_IFINFO:
ifm = (struct if_msghdr *)rtm;
(void)printf("if# %d, %s, flags: ", ifm->ifm_index,
#ifdef SMALL
""
#else
linkstate(ifm)
#endif /* SMALL */
);
bprintf(stdout, ifm->ifm_flags, ifnetflags);
pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
break;
case RTM_NEWADDR:
case RTM_DELADDR:
case RTM_CHGADDR:
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;
case RTM_IEEE80211:
ifan = (struct if_announcemsghdr *)rtm;
(void)printf("if# %d, what: ", ifan->ifan_index);
switch (ifan->ifan_what) {
case RTM_IEEE80211_ASSOC:
printf("associate");
break;
case RTM_IEEE80211_REASSOC:
printf("re-associate");
break;
case RTM_IEEE80211_DISASSOC:
printf("disassociate");
break;
case RTM_IEEE80211_SCAN:
printf("scan complete");
break;
case RTM_IEEE80211_JOIN:
evlen = sizeof(ev.join);
printf("join");
break;
case RTM_IEEE80211_LEAVE:
evlen = sizeof(ev.leave);
printf("leave");
break;
case RTM_IEEE80211_MICHAEL:
evlen = sizeof(ev.michael);
printf("michael");
break;
case RTM_IEEE80211_REPLAY:
evlen = sizeof(ev.replay);
printf("replay");
break;
default:
evlen = 0;
printf("#%d", ifan->ifan_what);
break;
}
if (sizeof(*ifan) + evlen > ifan->ifan_msglen) {
printf(" (truncated)\n");
break;
}
(void)memcpy(&ev, (ifan + 1), evlen);
switch (ifan->ifan_what) {
case RTM_IEEE80211_JOIN:
case RTM_IEEE80211_LEAVE:
printf(" mac %" PRIETHER,
PRIETHER_ARGS(ev.join.iev_addr));
break;
case RTM_IEEE80211_REPLAY:
case RTM_IEEE80211_MICHAEL:
printf(" src %" PRIETHER " dst %" PRIETHER
" cipher %" PRIu8 " keyix %" PRIu8,
PRIETHER_ARGS(ev.replay.iev_src),
PRIETHER_ARGS(ev.replay.iev_dst),
ev.replay.iev_cipher,
ev.replay.iev_keyix);
if (ifan->ifan_what == RTM_IEEE80211_REPLAY) {
printf(" key rsc %#" PRIx64
" frame rsc %#" PRIx64,
ev.replay.iev_keyrsc, ev.replay.iev_rsc);
}
break;
default:
break;
}
printf("\n");
break;
case RTM_IFANNOUNCE:
ifan = (struct if_announcemsghdr *)rtm;
(void)printf("if# %d, what: ", ifan->ifan_index);
switch (ifan->ifan_what) {
case IFAN_ARRIVAL:
printf("arrival");
break;
case IFAN_DEPARTURE:
printf("departure");
break;
default:
printf("#%d", ifan->ifan_what);
break;
}
printf("\n");
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 int
print_getmsg(struct rt_msghdr *rtm, int msglen, struct sou *soup)
{
struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL, *mpls = NULL;
struct sockaddr_dl *ifp = NULL;
struct sockaddr *sa;
char *cp;
int i;
if (! shortoutput) {
(void)printf(" route to: %s\n",
routename(&soup->so_dst->sa, NULL, RTF_HOST));
}
if (rtm->rtm_version != RTM_VERSION) {
warnx("routing message version %d not understood",
rtm->rtm_version);
return 1;
}
if (rtm->rtm_msglen > msglen) {
warnx("message length mismatch, in packet %d, returned %d",
rtm->rtm_msglen, msglen);
}
if (rtm->rtm_errno) {
warnx("RTM_GET: %s (errno %d)",
strerror(rtm->rtm_errno), rtm->rtm_errno);
return 1;
}
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;
case RTA_IFA:
ifa = sa;
break;
case RTA_TAG:
mpls = sa;
break;
}
RT_ADVANCE(cp, sa);
}
if (dst && mask)
mask->sa_family = dst->sa_family; /* XXX */
if (dst && ! shortoutput)
(void)printf("destination: %s\n",
routename(dst, mask, RTF_HOST));
if (mask && ! shortoutput) {
int savenflag = nflag;
nflag = 1;
(void)printf(" mask: %s\n",
routename(mask, NULL, RTF_HOST));
nflag = savenflag;
}
if (gate && rtm->rtm_flags & RTF_GATEWAY) {
const char *name;
name = routename(gate, NULL, RTF_HOST);
if (shortoutput) {
if (*name == '\0')
return 1;
(void)printf("%s\n", name);
} else
(void)printf(" gateway: %s\n", name);
}
if (mpls) {
const char *name;
name = routename(mpls, NULL, RTF_HOST);
if(shortoutput) {
if (*name == '\0')
return 1;
printf("%s\n", name);
} else
printf(" Tag: %s\n", name);
}
if (ifa && ! shortoutput)
(void)printf(" local addr: %s\n",
routename(ifa, NULL, RTF_HOST));
if (ifp && ! shortoutput)
(void)printf(" interface: %.*s\n",
ifp->sdl_nlen, ifp->sdl_data);
if (! shortoutput) {
(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 */
if (! shortoutput) {
(void)printf("\n%s\n", "\
recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire");
printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
printf("%8"PRId64"%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
printf("%8"PRId64"%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
if (rtm->rtm_rmx.rmx_expire)
rtm->rtm_rmx.rmx_expire -= time(0);
printf("%8"PRId64"%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 (shortoutput)
return (rtm->rtm_addrs & RTF_GATEWAY) == 0;
else if (verbose)
pmsg_common(rtm);
else if (rtm->rtm_addrs &~ RTA_IGN) {
(void)printf("sockaddrs: ");
bprintf(stdout, rtm->rtm_addrs, addrnames);
putchar('\n');
}
return 0;
#undef RTA_IGN
}
#endif /* SMALL */
void
pmsg_common(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
extract_addrs(const char *cp, int addrs, const struct sockaddr *sa[], int *nmfp)
{
int i, nmf = -1;
for (i = 0; i < RTAX_MAX; i++) {
if ((1 << i) & addrs) {
sa[i] = (const struct sockaddr *)cp;
if ((i == RTAX_DST || i == RTAX_IFA) &&
nmf == -1)
nmf = sa[i]->sa_family;
RT_ADVANCE(cp, sa[i]);
} else
sa[i] = NULL;
}
if (nmfp != NULL)
*nmfp = nmf;
}
static void
pmsg_addrs(const char *cp, int addrs)
{
const struct sockaddr *sa[RTAX_MAX];
int i, nmf;
if (addrs != 0) {
(void)printf("\nsockaddrs: ");
bprintf(stdout, addrs, addrnames);
(void)putchar('\n');
extract_addrs(cp, addrs, sa, &nmf);
for (i = 0; i < RTAX_MAX; i++) {
if (sa[i] == NULL)
continue;
if (i == RTAX_NETMASK && sa[i]->sa_len)
(void)printf(" %s",
netmask_string(sa[i], -1, nmf));
else
(void)printf(" %s",
routename(sa[i], NULL, RTF_HOST));
}
}
(void)putchar('\n');
(void)fflush(stdout);
}
static void
bprintf(FILE *fp, int b, const char *f)
{
int i;
int gotsome = 0;
const uint8_t *s = (const uint8_t *)f;
if (b == 0) {
fputs("none", fp);
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);
}
int
keyword(const char *cp)
{
struct keytab *kt = keywords;
while (kt->kt_cp && strcmp(kt->kt_cp, cp))
kt++;
return kt->kt_i;
}
static void
sodump(sup su, const char *which)
{
#ifdef INET6
char ntop_buf[NI_MAXHOST];
#endif
switch (su->sa.sa_family) {
case AF_INET:
(void)printf("%s: inet %s; ",
which, inet_ntoa(su->sin.sin_addr));
break;
#ifndef SMALL
case AF_APPLETALK:
(void)printf("%s: atalk %d.%d; ",
which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node);
break;
#endif
case AF_LINK:
(void)printf("%s: link %s; ",
which, link_ntoa(&su->sdl));
break;
#ifdef INET6
case AF_INET6:
(void)printf("%s: inet6 %s; ",
which, inet_ntop(AF_INET6, &su->sin6.sin6_addr,
ntop_buf, sizeof(ntop_buf)));
break;
#endif
#ifndef SMALL
case AF_MPLS:
{
union mpls_shim ms;
const union mpls_shim *pms;
int psize = sizeof(struct sockaddr_mpls);
ms.s_addr = ntohl(su->smpls.smpls_addr.s_addr);
printf("%s: mpls %u; ",
which, ms.shim.label);
pms = &su->smpls.smpls_addr;
while(psize < su->smpls.smpls_len) {
pms++;
ms.s_addr = ntohl(pms->s_addr);
printf("%u; ", ms.shim.label);
psize += sizeof(ms);
}
break;
}
#endif /* SMALL */
default:
(void)printf("%s: (%d) %s; ",
which, su->sa.sa_family, 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(const 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;
}
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