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freebsd-dev/sbin/route/route.c
Ryan Stone 60d978a75b Fix /sbin/route to never look up (invalid) interface names through DNS 
/sbin/route has a bug where if it is passed an interface name that does
not exist, it falls through and winds up interpreting it as a hostname.
It fails out eventually, but on a system where DNS lookup is broken you
can end up waiting for up to 60 seconds waiting for the DNS lookup to
timeout.  I'm not quite sure what happens if the DNS lookup somehow
succeeds but I doubt that can end well.

Reviewed by:	markj, cem
MFC after:	2 weeks
Sponsored by:	EMC/Isilon Storage Division
2015-09-17 16:56:49 +00:00

1933 lines
43 KiB
C
Raw Blame History

/*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char 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";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <paths.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <time.h>
#include <unistd.h>
#include <ifaddrs.h>
struct fibl {
TAILQ_ENTRY(fibl) fl_next;
int fl_num;
int fl_error;
int fl_errno;
};
static struct keytab {
const char *kt_cp;
int kt_i;
} const keywords[] = {
#include "keywords.h"
{0, 0}
};
static struct sockaddr_storage so[RTAX_MAX];
static int pid, rtm_addrs;
static int s;
static int nflag, af, qflag, tflag;
static int verbose, aflen;
static int locking, lockrest, debugonly;
static struct rt_metrics rt_metrics;
static u_long rtm_inits;
static uid_t uid;
static int defaultfib;
static int numfibs;
static char domain[MAXHOSTNAMELEN + 1];
static bool domain_initialized;
static int rtm_seq;
static char rt_line[NI_MAXHOST];
static char net_line[MAXHOSTNAMELEN + 1];
static struct {
struct rt_msghdr m_rtm;
char m_space[512];
} m_rtmsg;
static TAILQ_HEAD(fibl_head_t, fibl) fibl_head;
static void printb(int, const char *);
static void flushroutes(int argc, char *argv[]);
static int flushroutes_fib(int);
static int getaddr(int, char *, struct hostent **, int);
static int keyword(const char *);
#ifdef INET
static void inet_makenetandmask(u_long, struct sockaddr_in *,
struct sockaddr_in *, u_long);
#endif
#ifdef INET6
static int inet6_makenetandmask(struct sockaddr_in6 *, const char *);
#endif
static void interfaces(void);
static void monitor(int, char*[]);
static const char *netname(struct sockaddr *);
static void newroute(int, char **);
static int newroute_fib(int, char *, int);
static void pmsg_addrs(char *, int, size_t);
static void pmsg_common(struct rt_msghdr *, size_t);
static int prefixlen(const char *);
static void print_getmsg(struct rt_msghdr *, int, int);
static void print_rtmsg(struct rt_msghdr *, size_t);
static const char *routename(struct sockaddr *);
static int rtmsg(int, int, int);
static void set_metric(char *, int);
static int set_sofib(int);
static void sockaddr(char *, struct sockaddr *, size_t);
static void sodump(struct sockaddr *, const char *);
static int fiboptlist_csv(const char *, struct fibl_head_t *);
static int fiboptlist_range(const char *, struct fibl_head_t *);
static void usage(const char *) __dead2;
static void
usage(const char *cp)
{
if (cp != NULL)
warnx("bad keyword: %s", cp);
errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]");
/* NOTREACHED */
}
int
main(int argc, char **argv)
{
int ch;
size_t len;
if (argc < 2)
usage(NULL);
while ((ch = getopt(argc, argv, "46nqdtv")) != -1)
switch(ch) {
case '4':
#ifdef INET
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
#else
errx(1, "IPv4 support is not compiled in");
#endif
break;
case '6':
#ifdef INET6
af = AF_INET6;
aflen = sizeof(struct sockaddr_in6);
#else
errx(1, "IPv6 support is not compiled in");
#endif
break;
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();
uid = geteuid();
if (tflag)
s = open(_PATH_DEVNULL, O_WRONLY, 0);
else
s = socket(PF_ROUTE, SOCK_RAW, 0);
if (s < 0)
err(EX_OSERR, "socket");
len = sizeof(numfibs);
if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1)
numfibs = -1;
len = sizeof(defaultfib);
if (numfibs != -1 &&
sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL,
0) == -1)
defaultfib = -1;
if (*argv != NULL)
switch (keyword(*argv)) {
case K_GET:
case K_SHOW:
uid = 0;
/* FALLTHROUGH */
case K_CHANGE:
case K_ADD:
case K_DEL:
case K_DELETE:
newroute(argc, argv);
/* NOTREACHED */
case K_MONITOR:
monitor(argc, argv);
/* NOTREACHED */
case K_FLUSH:
flushroutes(argc, argv);
exit(0);
/* NOTREACHED */
}
usage(*argv);
/* NOTREACHED */
}
static int
set_sofib(int fib)
{
if (fib < 0)
return (0);
return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib,
sizeof(fib)));
}
static int
fiboptlist_range(const char *arg, struct fibl_head_t *flh)
{
struct fibl *fl;
char *str0, *str, *token, *endptr;
int fib[2], i, error;
str0 = str = strdup(arg);
error = 0;
i = 0;
while ((token = strsep(&str, "-")) != NULL) {
switch (i) {
case 0:
case 1:
errno = 0;
fib[i] = strtol(token, &endptr, 0);
if (errno == 0) {
if (*endptr != '\0' ||
fib[i] < 0 ||
(numfibs != -1 && fib[i] > numfibs - 1))
errno = EINVAL;
}
if (errno)
error = 1;
break;
default:
error = 1;
}
if (error)
goto fiboptlist_range_ret;
i++;
}
if (fib[0] >= fib[1]) {
error = 1;
goto fiboptlist_range_ret;
}
for (i = fib[0]; i <= fib[1]; i++) {
fl = calloc(1, sizeof(*fl));
if (fl == NULL) {
error = 1;
goto fiboptlist_range_ret;
}
fl->fl_num = i;
TAILQ_INSERT_TAIL(flh, fl, fl_next);
}
fiboptlist_range_ret:
free(str0);
return (error);
}
#define ALLSTRLEN 64
static int
fiboptlist_csv(const char *arg, struct fibl_head_t *flh)
{
struct fibl *fl;
char *str0, *str, *token, *endptr;
int fib, error;
str0 = str = NULL;
if (strcmp("all", arg) == 0) {
str = calloc(1, ALLSTRLEN);
if (str == NULL) {
error = 1;
goto fiboptlist_csv_ret;
}
if (numfibs > 1)
snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
else
snprintf(str, ALLSTRLEN - 1, "%d", 0);
} else if (strcmp("default", arg) == 0) {
str0 = str = calloc(1, ALLSTRLEN);
if (str == NULL) {
error = 1;
goto fiboptlist_csv_ret;
}
snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);
} else
str0 = str = strdup(arg);
error = 0;
while ((token = strsep(&str, ",")) != NULL) {
if (*token != '-' && strchr(token, '-') != NULL) {
error = fiboptlist_range(token, flh);
if (error)
goto fiboptlist_csv_ret;
} else {
errno = 0;
fib = strtol(token, &endptr, 0);
if (errno == 0) {
if (*endptr != '\0' ||
fib < 0 ||
(numfibs != -1 && fib > numfibs - 1))
errno = EINVAL;
}
if (errno) {
error = 1;
goto fiboptlist_csv_ret;
}
fl = calloc(1, sizeof(*fl));
if (fl == NULL) {
error = 1;
goto fiboptlist_csv_ret;
}
fl->fl_num = fib;
TAILQ_INSERT_TAIL(flh, fl, fl_next);
}
}
fiboptlist_csv_ret:
if (str0 != NULL)
free(str0);
return (error);
}
/*
* Purge all entries in the routing tables not
* associated with network interfaces.
*/
static void
flushroutes(int argc, char *argv[])
{
struct fibl *fl;
int error;
if (uid != 0 && !debugonly && !tflag)
errx(EX_NOPERM, "must be root to alter routing table");
shutdown(s, SHUT_RD); /* Don't want to read back our messages */
TAILQ_INIT(&fibl_head);
while (argc > 1) {
argc--;
argv++;
if (**argv != '-')
usage(*argv);
switch (keyword(*argv + 1)) {
#ifdef INET
case K_4:
case K_INET:
af = AF_INET;
break;
#endif
#ifdef INET6
case K_6:
case K_INET6:
af = AF_INET6;
break;
#endif
case K_LINK:
af = AF_LINK;
break;
case K_FIB:
if (!--argc)
usage(*argv);
error = fiboptlist_csv(*++argv, &fibl_head);
if (error)
errx(EX_USAGE, "invalid fib number: %s", *argv);
break;
default:
usage(*argv);
}
}
if (TAILQ_EMPTY(&fibl_head)) {
error = fiboptlist_csv("default", &fibl_head);
if (error)
errx(EX_OSERR, "fiboptlist_csv failed.");
}
TAILQ_FOREACH(fl, &fibl_head, fl_next)
flushroutes_fib(fl->fl_num);
}
static int
flushroutes_fib(int fib)
{
struct rt_msghdr *rtm;
size_t needed;
char *buf, *next, *lim;
int mib[7], rlen, seqno, count = 0;
int error;
error = set_sofib(fib);
if (error) {
warn("fib number %d is ignored", fib);
return (error);
}
retry:
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = AF_UNSPEC;
mib[4] = NET_RT_DUMP;
mib[5] = 0; /* no flags */
mib[6] = fib;
if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
err(EX_OSERR, "route-sysctl-estimate");
if ((buf = malloc(needed)) == NULL)
errx(EX_OSERR, "malloc failed");
if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
if (errno == ENOMEM && count++ < 10) {
warnx("Routing table grew, retrying");
sleep(1);
free(buf);
goto retry;
}
err(EX_OSERR, "route-sysctl-get");
}
lim = buf + needed;
if (verbose)
(void)printf("Examining routing table from sysctl\n");
seqno = 0; /* ??? */
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)(void *)next;
if (verbose)
print_rtmsg(rtm, rtm->rtm_msglen);
if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
continue;
if (af != 0) {
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 < 0 && errno == EPERM)
err(1, "write to routing socket");
if (rlen < (int)rtm->rtm_msglen) {
warn("write to routing socket");
(void)printf("got only %d for rlen\n", rlen);
free(buf);
goto retry;
break;
}
seqno++;
if (qflag)
continue;
if (verbose)
print_rtmsg(rtm, rlen);
else {
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
routename(sa) : netname(sa));
sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
printf("%-20.20s ", routename(sa));
if (fib >= 0)
printf("-fib %-3d ", fib);
printf("done\n");
}
}
return (error);
}
static const char *
routename(struct sockaddr *sa)
{
struct sockaddr_dl *sdl;
const char *cp;
int n;
if (!domain_initialized) {
domain_initialized = true;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = strchr(domain, '.'))) {
domain[MAXHOSTNAMELEN] = '\0';
(void)strcpy(domain, cp + 1);
} else
domain[0] = '\0';
}
/* If the address is zero-filled, use "default". */
if (sa->sa_len == 0 && nflag == 0)
return ("default");
#if defined(INET) || defined(INET6)
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
/* If the address is zero-filled, use "default". */
if (nflag == 0 &&
((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr ==
INADDR_ANY)
return("default");
break;
#endif
#ifdef INET6
case AF_INET6:
/* If the address is zero-filled, use "default". */
if (nflag == 0 &&
IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr))
return("default");
break;
#endif
}
#endif
switch (sa->sa_family) {
#if defined(INET) || defined(INET6)
#ifdef INET
case AF_INET:
#endif
#ifdef INET6
case AF_INET6:
#endif
{
struct sockaddr_storage ss;
int error;
char *p;
memset(&ss, 0, sizeof(ss));
if (sa->sa_len == 0)
ss.ss_family = sa->sa_family;
else
memcpy(&ss, sa, sa->sa_len);
/* Expand sa->sa_len because it could be shortened. */
if (sa->sa_family == AF_INET)
ss.ss_len = sizeof(struct sockaddr_in);
else if (sa->sa_family == AF_INET6)
ss.ss_len = sizeof(struct sockaddr_in6);
error = getnameinfo((struct sockaddr *)&ss, ss.ss_len,
rt_line, sizeof(rt_line), NULL, 0,
(nflag == 0) ? 0 : NI_NUMERICHOST);
if (error) {
warnx("getnameinfo(): %s", gai_strerror(error));
strncpy(rt_line, "invalid", sizeof(rt_line));
}
/* Remove the domain part if any. */
p = strchr(rt_line, '.');
if (p != NULL && strcmp(p + 1, domain) == 0)
*p = '\0';
return (rt_line);
break;
}
#endif
case AF_LINK:
sdl = (struct sockaddr_dl *)(void *)sa;
if (sdl->sdl_nlen == 0 &&
sdl->sdl_alen == 0 &&
sdl->sdl_slen == 0) {
n = snprintf(rt_line, sizeof(rt_line), "link#%d",
sdl->sdl_index);
if (n > (int)sizeof(rt_line))
rt_line[0] = '\0';
return (rt_line);
} else
return (link_ntoa(sdl));
break;
default:
{
u_short *sp = (u_short *)(void *)sa;
u_short *splim = sp + ((sa->sa_len + 1) >> 1);
char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family);
char *cpe = rt_line + sizeof(rt_line);
while (++sp < splim && cps < cpe) /* start with sa->sa_data */
if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
cps += n;
else
*cps = '\0';
break;
}
}
return (rt_line);
}
/*
* Return the name of the network whose address is given.
* The address is assumed to be that of a net, not a host.
*/
static const char *
netname(struct sockaddr *sa)
{
struct sockaddr_dl *sdl;
int n;
#ifdef INET
struct netent *np = NULL;
const char *cp = NULL;
u_long i;
#endif
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
{
struct in_addr in;
in = ((struct sockaddr_in *)(void *)sa)->sin_addr;
i = in.s_addr = ntohl(in.s_addr);
if (in.s_addr == 0)
cp = "default";
else if (!nflag) {
np = getnetbyaddr(i, AF_INET);
if (np != NULL)
cp = np->n_name;
}
#define C(x) (unsigned)((x) & 0xff)
if (cp != NULL)
strncpy(net_line, cp, sizeof(net_line));
else if ((in.s_addr & 0xffffff) == 0)
(void)sprintf(net_line, "%u", C(in.s_addr >> 24));
else if ((in.s_addr & 0xffff) == 0)
(void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16));
else if ((in.s_addr & 0xff) == 0)
(void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8));
else
(void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8),
C(in.s_addr));
#undef C
break;
}
#endif
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 sin6;
int niflags = 0;
memset(&sin6, 0, sizeof(sin6));
memcpy(&sin6, sa, sa->sa_len);
sin6.sin6_len = sizeof(sin6);
sin6.sin6_family = AF_INET6;
if (nflag)
niflags |= NI_NUMERICHOST;
if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
net_line, sizeof(net_line), NULL, 0, niflags) != 0)
strncpy(net_line, "invalid", sizeof(net_line));
return(net_line);
}
#endif
case AF_LINK:
sdl = (struct sockaddr_dl *)(void *)sa;
if (sdl->sdl_nlen == 0 &&
sdl->sdl_alen == 0 &&
sdl->sdl_slen == 0) {
n = snprintf(net_line, sizeof(net_line), "link#%d",
sdl->sdl_index);
if (n > (int)sizeof(net_line))
net_line[0] = '\0';
return (net_line);
} else
return (link_ntoa(sdl));
break;
default:
{
u_short *sp = (u_short *)(void *)sa->sa_data;
u_short *splim = sp + ((sa->sa_len + 1)>>1);
char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family);
char *cpe = net_line + sizeof(net_line);
while (sp < splim && cps < cpe)
if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
cps += n;
else
*cps = '\0';
break;
}
}
return (net_line);
}
static void
set_metric(char *value, int key)
{
int flag = 0;
char *endptr;
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);
caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
}
rtm_inits |= flag;
if (lockrest || locking)
rt_metrics.rmx_locks |= flag;
if (locking)
locking = 0;
errno = 0;
*valp = strtol(value, &endptr, 0);
if (errno == 0 && *endptr != '\0')
errno = EINVAL;
if (errno)
err(EX_USAGE, "%s", value);
if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) {
struct timespec ts;
clock_gettime(CLOCK_REALTIME_FAST, &ts);
*valp += ts.tv_sec;
}
}
#define F_ISHOST 0x01
#define F_FORCENET 0x02
#define F_FORCEHOST 0x04
#define F_PROXY 0x08
#define F_INTERFACE 0x10
static void
newroute(int argc, char **argv)
{
struct hostent *hp;
struct fibl *fl;
char *cmd;
const char *dest, *gateway, *errmsg;
int key, error, flags, nrflags, fibnum;
if (uid != 0 && !debugonly && !tflag)
errx(EX_NOPERM, "must be root to alter routing table");
dest = NULL;
gateway = NULL;
flags = RTF_STATIC;
nrflags = 0;
hp = NULL;
TAILQ_INIT(&fibl_head);
cmd = argv[0];
if (*cmd != 'g' && *cmd != 's')
shutdown(s, SHUT_RD); /* Don't want to read back our messages */
while (--argc > 0) {
if (**(++argv)== '-') {
switch (key = keyword(1 + *argv)) {
case K_LINK:
af = AF_LINK;
aflen = sizeof(struct sockaddr_dl);
break;
#ifdef INET
case K_4:
case K_INET:
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
break;
#endif
#ifdef INET6
case K_6:
case K_INET6:
af = AF_INET6;
aflen = sizeof(struct sockaddr_in6);
break;
#endif
case K_SA:
af = PF_ROUTE;
aflen = sizeof(struct sockaddr_storage);
break;
case K_IFACE:
case K_INTERFACE:
nrflags |= F_INTERFACE;
break;
case K_NOSTATIC:
flags &= ~RTF_STATIC;
break;
case K_LOCK:
locking = 1;
break;
case K_LOCKREST:
lockrest = 1;
break;
case K_HOST:
nrflags |= F_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_PROXY:
nrflags |= F_PROXY;
break;
case K_XRESOLVE:
flags |= RTF_XRESOLVE;
break;
case K_STATIC:
flags |= RTF_STATIC;
break;
case K_STICKY:
flags |= RTF_STICKY;
break;
case K_NOSTICK:
flags &= ~RTF_STICKY;
break;
case K_FIB:
if (!--argc)
usage(NULL);
error = fiboptlist_csv(*++argv, &fibl_head);
if (error)
errx(EX_USAGE,
"invalid fib number: %s", *argv);
break;
case K_IFA:
if (!--argc)
usage(NULL);
getaddr(RTAX_IFA, *++argv, 0, nrflags);
break;
case K_IFP:
if (!--argc)
usage(NULL);
getaddr(RTAX_IFP, *++argv, 0, nrflags);
break;
case K_GENMASK:
if (!--argc)
usage(NULL);
getaddr(RTAX_GENMASK, *++argv, 0, nrflags);
break;
case K_GATEWAY:
if (!--argc)
usage(NULL);
getaddr(RTAX_GATEWAY, *++argv, 0, nrflags);
gateway = *argv;
break;
case K_DST:
if (!--argc)
usage(NULL);
if (getaddr(RTAX_DST, *++argv, &hp, nrflags))
nrflags |= F_ISHOST;
dest = *argv;
break;
case K_NETMASK:
if (!--argc)
usage(NULL);
getaddr(RTAX_NETMASK, *++argv, 0, nrflags);
/* FALLTHROUGH */
case K_NET:
nrflags |= F_FORCENET;
break;
case K_PREFIXLEN:
if (!--argc)
usage(NULL);
if (prefixlen(*++argv) == -1) {
nrflags &= ~F_FORCENET;
nrflags |= F_ISHOST;
} else {
nrflags |= F_FORCENET;
nrflags &= ~F_ISHOST;
}
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:
case K_WEIGHT:
if (!--argc)
usage(NULL);
set_metric(*++argv, key);
break;
default:
usage(1+*argv);
}
} else {
if ((rtm_addrs & RTA_DST) == 0) {
dest = *argv;
if (getaddr(RTAX_DST, *argv, &hp, nrflags))
nrflags |= F_ISHOST;
} else if ((rtm_addrs & RTA_GATEWAY) == 0) {
gateway = *argv;
getaddr(RTAX_GATEWAY, *argv, &hp, nrflags);
} else {
getaddr(RTAX_NETMASK, *argv, 0, nrflags);
nrflags |= F_FORCENET;
}
}
}
/* Do some sanity checks on resulting request */
if (so[RTAX_DST].ss_len == 0) {
warnx("destination parameter required");
usage(NULL);
}
if (so[RTAX_NETMASK].ss_len != 0 &&
so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) {
warnx("destination and netmask family need to be the same");
usage(NULL);
}
if (nrflags & F_FORCEHOST) {
nrflags |= F_ISHOST;
#ifdef INET6
if (af == AF_INET6) {
rtm_addrs &= ~RTA_NETMASK;
memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK]));
}
#endif
}
if (nrflags & F_FORCENET)
nrflags &= ~F_ISHOST;
flags |= RTF_UP;
if (nrflags & F_ISHOST)
flags |= RTF_HOST;
if ((nrflags & F_INTERFACE) == 0)
flags |= RTF_GATEWAY;
if (nrflags & F_PROXY)
flags |= RTF_ANNOUNCE;
if (dest == NULL)
dest = "";
if (gateway == NULL)
gateway = "";
if (TAILQ_EMPTY(&fibl_head)) {
error = fiboptlist_csv("default", &fibl_head);
if (error)
errx(EX_OSERR, "fiboptlist_csv failed.");
}
error = 0;
TAILQ_FOREACH(fl, &fibl_head, fl_next) {
fl->fl_error = newroute_fib(fl->fl_num, cmd, flags);
if (fl->fl_error)
fl->fl_errno = errno;
error += fl->fl_error;
}
if (*cmd == 'g' || *cmd == 's')
exit(error);
error = 0;
if (!qflag) {
fibnum = 0;
TAILQ_FOREACH(fl, &fibl_head, fl_next) {
if (fl->fl_error == 0)
fibnum++;
}
if (fibnum > 0) {
int firstfib = 1;
printf("%s %s %s", cmd,
(nrflags & F_ISHOST) ? "host" : "net", dest);
if (*gateway)
printf(": gateway %s", gateway);
if (numfibs > 1) {
TAILQ_FOREACH(fl, &fibl_head, fl_next) {
if (fl->fl_error == 0
&& fl->fl_num >= 0) {
if (firstfib) {
printf(" fib ");
firstfib = 0;
}
printf("%d", fl->fl_num);
if (fibnum-- > 1)
printf(",");
}
}
}
printf("\n");
}
fibnum = 0;
TAILQ_FOREACH(fl, &fibl_head, fl_next) {
if (fl->fl_error != 0) {
printf("%s %s %s", cmd, (nrflags & F_ISHOST)
? "host" : "net", dest);
if (*gateway)
printf(": gateway %s", gateway);
if (fl->fl_num >= 0)
printf(" fib %d", fl->fl_num);
switch (fl->fl_errno) {
case ESRCH:
errmsg = "not in table";
break;
case EBUSY:
errmsg = "entry in use";
break;
case ENOBUFS:
errmsg = "not enough memory";
break;
case EADDRINUSE:
/*
* handle recursion avoidance
* in rt_setgate()
*/
errmsg = "gateway uses the same route";
break;
case EEXIST:
errmsg = "route already in table";
break;
default:
errmsg = strerror(fl->fl_errno);
break;
}
printf(": %s\n", errmsg);
error = 1;
}
}
}
exit(error);
}
static int
newroute_fib(int fib, char *cmd, int flags)
{
int error;
error = set_sofib(fib);
if (error) {
warn("fib number %d is ignored", fib);
return (error);
}
error = rtmsg(*cmd, flags, fib);
return (error);
}
#ifdef INET
static void
inet_makenetandmask(u_long net, struct sockaddr_in *sin,
struct sockaddr_in *sin_mask, u_long bits)
{
u_long mask = 0;
rtm_addrs |= RTA_NETMASK;
/*
* MSB of net should be meaningful. 0/0 is exception.
*/
if (net > 0)
while ((net & 0xff000000) == 0)
net <<= 8;
/*
* If no /xx was specified we must calculate the
* CIDR address.
*/
if ((bits == 0) && (net != 0)) {
u_long i, j;
for(i = 0, j = 0xff; i < 4; i++) {
if (net & j) {
break;
}
j <<= 8;
}
/* i holds the first non zero bit */
bits = 32 - (i*8);
}
if (bits != 0)
mask = 0xffffffff << (32 - bits);
sin->sin_addr.s_addr = htonl(net);
sin_mask->sin_addr.s_addr = htonl(mask);
sin_mask->sin_len = sizeof(struct sockaddr_in);
sin_mask->sin_family = AF_INET;
}
#endif
#ifdef INET6
/*
* XXX the function may need more improvement...
*/
static int
inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
{
if (plen == NULL) {
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
sin6->sin6_scope_id == 0)
plen = "0";
}
if (plen == NULL || strcmp(plen, "128") == 0)
return (1);
rtm_addrs |= RTA_NETMASK;
prefixlen(plen);
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 idx, char *str, struct hostent **hpp, int nrflags)
{
struct sockaddr *sa;
#if defined(INET)
struct sockaddr_in *sin;
struct hostent *hp;
struct netent *np;
u_long val;
char *q;
#elif defined(INET6)
char *q;
#endif
if (idx < 0 || idx >= RTAX_MAX)
usage("internal error");
if (af == 0) {
#if defined(INET)
af = AF_INET;
aflen = sizeof(struct sockaddr_in);
#elif defined(INET6)
af = AF_INET6;
aflen = sizeof(struct sockaddr_in6);
#else
af = AF_LINK;
aflen = sizeof(struct sockaddr_dl);
#endif
}
#ifndef INET
hpp = NULL;
#endif
rtm_addrs |= (1 << idx);
sa = (struct sockaddr *)&so[idx];
sa->sa_family = af;
sa->sa_len = aflen;
switch (idx) {
case RTAX_GATEWAY:
if (nrflags & F_INTERFACE) {
struct ifaddrs *ifap, *ifa;
struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa;
struct sockaddr_dl *sdl = NULL;
if (getifaddrs(&ifap))
err(EX_OSERR, "getifaddrs");
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
if (strcmp(str, ifa->ifa_name) != 0)
continue;
sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr;
}
/* If we found it, then use it */
if (sdl != NULL) {
/*
* Note that we need to copy before calling
* freeifaddrs().
*/
memcpy(sdl0, sdl, sdl->sdl_len);
}
freeifaddrs(ifap);
if (sdl != NULL)
return(1);
else
errx(EX_DATAERR,
"interface '%s' does not exist", str);
}
break;
case RTAX_IFP:
sa->sa_family = AF_LINK;
break;
}
if (strcmp(str, "default") == 0) {
/*
* Default is net 0.0.0.0/0
*/
switch (idx) {
case RTAX_DST:
nrflags |= F_FORCENET;
getaddr(RTAX_NETMASK, str, 0, nrflags);
break;
}
return (0);
}
switch (sa->sa_family) {
#ifdef INET6
case AF_INET6:
{
struct addrinfo hints, *res;
int ecode;
q = NULL;
if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL)
*q = '\0';
memset(&hints, 0, sizeof(hints));
hints.ai_family = sa->sa_family;
hints.ai_socktype = SOCK_DGRAM;
ecode = getaddrinfo(str, NULL, &hints, &res);
if (ecode != 0 || res->ai_family != AF_INET6 ||
res->ai_addrlen != sizeof(struct sockaddr_in6))
errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode));
memcpy(sa, res->ai_addr, res->ai_addrlen);
freeaddrinfo(res);
if (q != NULL)
*q++ = '/';
if (idx == RTAX_DST)
return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q));
return (0);
}
#endif /* INET6 */
case AF_LINK:
link_addr(str, (struct sockaddr_dl *)(void *)sa);
return (1);
case PF_ROUTE:
sockaddr(str, sa, sizeof(struct sockaddr_storage));
return (1);
#ifdef INET
case AF_INET:
#endif
default:
break;
}
#ifdef INET
sin = (struct sockaddr_in *)(void *)sa;
if (hpp == NULL)
hpp = &hp;
*hpp = NULL;
q = strchr(str,'/');
if (q != NULL && idx == RTAX_DST) {
*q = '\0';
if ((val = inet_network(str)) != INADDR_NONE) {
inet_makenetandmask(val, sin,
(struct sockaddr_in *)&so[RTAX_NETMASK],
strtoul(q+1, 0, 0));
return (0);
}
*q = '/';
}
if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) &&
inet_aton(str, &sin->sin_addr)) {
val = sin->sin_addr.s_addr;
if (idx != RTAX_DST || nrflags & F_FORCEHOST ||
inet_lnaof(sin->sin_addr) != INADDR_ANY)
return (1);
else {
val = ntohl(val);
goto netdone;
}
}
if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 &&
((val = inet_network(str)) != INADDR_NONE ||
((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
netdone:
inet_makenetandmask(val, sin,
(struct sockaddr_in *)&so[RTAX_NETMASK], 0);
return (0);
}
hp = gethostbyname(str);
if (hp != NULL) {
*hpp = hp;
sin->sin_family = hp->h_addrtype;
memmove((char *)&sin->sin_addr, hp->h_addr,
MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
return (1);
}
#endif
errx(EX_NOHOST, "bad address: %s", str);
}
static int
prefixlen(const char *str)
{
int len = atoi(str), q, r;
int max;
char *p;
rtm_addrs |= RTA_NETMASK;
switch (af) {
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sin6 =
(struct sockaddr_in6 *)&so[RTAX_NETMASK];
max = 128;
p = (char *)&sin6->sin6_addr;
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
break;
}
#endif
#ifdef INET
case AF_INET:
{
struct sockaddr_in *sin =
(struct sockaddr_in *)&so[RTAX_NETMASK];
max = 32;
p = (char *)&sin->sin_addr;
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
break;
}
#endif
default:
errx(EX_OSERR, "prefixlen not supported in this af");
}
if (len < 0 || max < len)
errx(EX_USAGE, "%s: invalid prefixlen", str);
q = len >> 3;
r = len & 7;
memset((void *)p, 0, max / 8);
if (q > 0)
memset((void *)p, 0xff, q);
if (r > 0)
*((u_char *)p + q) = (0xff00 >> r) & 0xff;
if (len == max)
return (-1);
else
return (len);
}
static void
interfaces(void)
{
size_t needed;
int mib[6];
char *buf, *lim, *next, count = 0;
struct rt_msghdr *rtm;
retry2:
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = AF_UNSPEC;
mib[4] = NET_RT_IFLIST;
mib[5] = 0; /* no flags */
if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
err(EX_OSERR, "route-sysctl-estimate");
if ((buf = malloc(needed)) == NULL)
errx(EX_OSERR, "malloc failed");
if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
if (errno == ENOMEM && count++ < 10) {
warnx("Routing table grew, retrying");
sleep(1);
free(buf);
goto retry2;
}
err(EX_OSERR, "actual retrieval of interface table");
}
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)(void *)next;
print_rtmsg(rtm, rtm->rtm_msglen);
}
}
static void
monitor(int argc, char *argv[])
{
int n, fib, error;
char msg[2048], *endptr;
fib = defaultfib;
while (argc > 1) {
argc--;
argv++;
if (**argv != '-')
usage(*argv);
switch (keyword(*argv + 1)) {
case K_FIB:
if (!--argc)
usage(*argv);
errno = 0;
fib = strtol(*++argv, &endptr, 0);
if (errno == 0) {
if (*endptr != '\0' ||
fib < 0 ||
(numfibs != -1 && fib > numfibs - 1))
errno = EINVAL;
}
if (errno)
errx(EX_USAGE, "invalid fib number: %s", *argv);
break;
default:
usage(*argv);
}
}
error = set_sofib(fib);
if (error)
errx(EX_USAGE, "invalid fib number: %d", fib);
verbose = 1;
if (debugonly) {
interfaces();
exit(0);
}
for (;;) {
time_t now;
n = read(s, msg, 2048);
now = time(NULL);
(void)printf("\ngot message of size %d on %s", n, ctime(&now));
print_rtmsg((struct rt_msghdr *)(void *)msg, n);
}
}
static int
rtmsg(int cmd, int flags, int fib)
{
int rlen;
char *cp = m_rtmsg.m_space;
int l;
#define NEXTADDR(w, u) \
if (rtm_addrs & (w)) { \
l = (((struct sockaddr *)&(u))->sa_len == 0) ? \
sizeof(long) : \
1 + ((((struct sockaddr *)&(u))->sa_len - 1) \
| (sizeof(long) - 1)); \
memmove(cp, (char *)&(u), l); \
cp += l; \
if (verbose) \
sodump((struct sockaddr *)&(u), #w); \
}
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' || cmd == 's') {
cmd = RTM_GET;
if (so[RTAX_IFP].ss_family == 0) {
so[RTAX_IFP].ss_family = AF_LINK;
so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl);
rtm_addrs |= RTA_IFP;
}
} 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 = ++rtm_seq;
rtm.rtm_addrs = rtm_addrs;
rtm.rtm_rmx = rt_metrics;
rtm.rtm_inits = rtm_inits;
NEXTADDR(RTA_DST, so[RTAX_DST]);
NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]);
NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]);
NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]);
NEXTADDR(RTA_IFP, so[RTAX_IFP]);
NEXTADDR(RTA_IFA, so[RTAX_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) {
switch (errno) {
case EPERM:
err(1, "writing to routing socket");
break;
case ESRCH:
warnx("route has not been found");
break;
case EEXIST:
/* Handled by newroute() */
break;
default:
warn("writing to routing socket");
}
return (-1);
}
if (cmd == RTM_GET) {
do {
l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid));
if (l < 0)
warn("read from routing socket");
else
print_getmsg(&rtm, l, fib);
}
#undef rtm
return (0);
}
static const char *const 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",
"RTM_NEWMADDR: new multicast group membership on iface",
"RTM_DELMADDR: multicast group membership removed from iface",
"RTM_IFANNOUNCE: interface arrival/departure",
"RTM_IEEE80211: IEEE 802.11 wireless event",
};
static const char metricnames[] =
"\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
"\1mtu";
static const char routeflags[] =
"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
"\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
"\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
"\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
static const char ifnetflags[] =
"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
"\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
"\017LINK2\020MULTICAST";
static const char addrnames[] =
"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
static const char errfmt[] =
"\n%s: truncated route message, only %zu bytes left\n";
static void
print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
{
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
#ifdef RTM_NEWMADDR
struct ifma_msghdr *ifmam;
#endif
struct if_announcemsghdr *ifan;
const char *state;
if (verbose == 0)
return;
if (rtm->rtm_version != RTM_VERSION) {
(void)printf("routing message version %d not understood\n",
rtm->rtm_version);
return;
}
if (rtm->rtm_type < nitems(msgtypes))
(void)printf("%s: ", msgtypes[rtm->rtm_type]);
else
(void)printf("unknown type %d: ", rtm->rtm_type);
(void)printf("len %d, ", rtm->rtm_msglen);
#define REQUIRE(x) do { \
if (msglen < sizeof(x)) \
goto badlen; \
else \
msglen -= sizeof(x); \
} while (0)
switch (rtm->rtm_type) {
case RTM_IFINFO:
REQUIRE(struct if_msghdr);
ifm = (struct if_msghdr *)rtm;
(void)printf("if# %d, ", ifm->ifm_index);
switch (ifm->ifm_data.ifi_link_state) {
case LINK_STATE_DOWN:
state = "down";
break;
case LINK_STATE_UP:
state = "up";
break;
default:
state = "unknown";
break;
}
(void)printf("link: %s, flags:", state);
printb(ifm->ifm_flags, ifnetflags);
pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
break;
case RTM_NEWADDR:
case RTM_DELADDR:
REQUIRE(struct ifa_msghdr);
ifam = (struct ifa_msghdr *)rtm;
(void)printf("metric %d, flags:", ifam->ifam_metric);
printb(ifam->ifam_flags, routeflags);
pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
break;
#ifdef RTM_NEWMADDR
case RTM_NEWMADDR:
case RTM_DELMADDR:
REQUIRE(struct ifma_msghdr);
ifmam = (struct ifma_msghdr *)rtm;
pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
break;
#endif
case RTM_IFANNOUNCE:
REQUIRE(struct if_announcemsghdr);
ifan = (struct if_announcemsghdr *)rtm;
(void)printf("if# %d, what: ", ifan->ifan_index);
switch (ifan->ifan_what) {
case IFAN_ARRIVAL:
(void)printf("arrival");
break;
case IFAN_DEPARTURE:
printf("departure");
break;
default:
printf("#%d", ifan->ifan_what);
break;
}
printf("\n");
fflush(stdout);
break;
default:
printf("pid: %ld, seq %d, errno %d, flags:",
(long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
printb(rtm->rtm_flags, routeflags);
pmsg_common(rtm, msglen);
}
return;
badlen:
(void)printf(errfmt, __func__, msglen);
#undef REQUIRE
}
static void
print_getmsg(struct rt_msghdr *rtm, int msglen, int fib)
{
struct sockaddr *sp[RTAX_MAX];
struct timespec ts;
char *cp;
int i;
memset(sp, 0, sizeof(sp));
(void)printf(" route to: %s\n",
routename((struct sockaddr *)&so[RTAX_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",
rtm->rtm_msglen, msglen);
return;
}
if (rtm->rtm_errno) {
errno = rtm->rtm_errno;
warn("message indicates error %d", errno);
return;
}
cp = ((char *)(rtm + 1));
for (i = 0; i < RTAX_MAX; i++)
if (rtm->rtm_addrs & (1 << i)) {
sp[i] = (struct sockaddr *)cp;
cp += SA_SIZE((struct sockaddr *)cp);
}
if ((rtm->rtm_addrs & RTA_IFP) &&
(sp[RTAX_IFP]->sa_family != AF_LINK ||
((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0))
sp[RTAX_IFP] = NULL;
if (sp[RTAX_DST])
(void)printf("destination: %s\n", routename(sp[RTAX_DST]));
if (sp[RTAX_NETMASK])
(void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK]));
if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY))
(void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY]));
if (fib >= 0)
(void)printf(" fib: %u\n", (unsigned int)fib);
if (sp[RTAX_IFP])
(void)printf(" interface: %.*s\n",
((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen,
((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data);
(void)printf(" flags: ");
printb(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 */
printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe",
"sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire");
printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
if (rtm->rtm_rmx.rmx_expire > 0)
clock_gettime(CLOCK_REALTIME_FAST, &ts);
else
ts.tv_sec = 0;
printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec),
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, msglen);
else if (rtm->rtm_addrs &~ RTA_IGN) {
(void)printf("sockaddrs: ");
printb(rtm->rtm_addrs, addrnames);
putchar('\n');
}
#undef RTA_IGN
}
static void
pmsg_common(struct rt_msghdr *rtm, size_t msglen)
{
(void)printf("\nlocks: ");
printb(rtm->rtm_rmx.rmx_locks, metricnames);
(void)printf(" inits: ");
printb(rtm->rtm_inits, metricnames);
if (msglen > sizeof(struct rt_msghdr))
pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
msglen - sizeof(struct rt_msghdr));
else
(void)fflush(stdout);
}
static void
pmsg_addrs(char *cp, int addrs, size_t len)
{
struct sockaddr *sa;
int i;
if (addrs == 0) {
(void)putchar('\n');
return;
}
(void)printf("\nsockaddrs: ");
printb(addrs, addrnames);
putchar('\n');
for (i = 0; i < RTAX_MAX; i++)
if (addrs & (1 << i)) {
sa = (struct sockaddr *)cp;
if (len == 0 || len < SA_SIZE(sa)) {
(void)printf(errfmt, __func__, len);
break;
}
(void)printf(" %s", routename(sa));
len -= SA_SIZE(sa);
cp += SA_SIZE(sa);
}
(void)putchar('\n');
(void)fflush(stdout);
}
static void
printb(int b, const char *str)
{
int i;
int gotsome = 0;
if (b == 0)
return;
while ((i = *str++) != 0) {
if (b & (1 << (i-1))) {
if (gotsome == 0)
i = '<';
else
i = ',';
putchar(i);
gotsome = 1;
for (; (i = *str) > 32; str++)
putchar(i);
} else
while (*str > 32)
str++;
}
if (gotsome)
putchar('>');
}
int
keyword(const char *cp)
{
const struct keytab *kt = keywords;
while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
kt++;
return (kt->kt_i);
}
static void
sodump(struct sockaddr *sa, const char *which)
{
#ifdef INET6
char nbuf[INET6_ADDRSTRLEN];
#endif
switch (sa->sa_family) {
case AF_LINK:
(void)printf("%s: link %s; ", which,
link_ntoa((struct sockaddr_dl *)(void *)sa));
break;
#ifdef INET
case AF_INET:
(void)printf("%s: inet %s; ", which,
inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr));
break;
#endif
#ifdef INET6
case AF_INET6:
(void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family,
&((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf,
sizeof(nbuf)));
break;
#endif
}
(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(char *addr, struct sockaddr *sa, size_t size)
{
char *cp = (char *)sa;
char *cplim = cp + size;
int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
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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