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freebsd-skq/sbin/route/route.c
Alexander V. Chernikov 3deb3649d5 Fix incorrect netmasks being passed via rtsock. 
Since radix has been ignoring sa_family in passed sockaddrs,
no one ever has bothered filling valid sa_family in netmasks.
Additionally, radix adjusts sa_len field in every netmask not to
compare zero bytes at all.

This leads us to rt_mask with sa_family of AF_UNSPEC (-1) and
arbitrary sa_len field (0 for default route, for example).

However, rtsock have been passing that rt_mask intact for ages,
requiring all rtsock consumers to make ther own local hacks.
We even have unfixed on in base:

do `route -n monitor` in one window and issue `route -n get addr`
for some directly-connected address. You will probably see the following:

got message of size 304 on Thu May  8 15:06:06 2014
RTM_GET: Report Metrics: len 304, pid: 30493, seq 1, errno 0, flags:<UP,DONE,PINNED>
locks:  inits:
sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA>
 10.0.0.0 link#1 (255) ffff ffff ff em0:8.0.27.c5.29.d4 10.0.0.92
_________________^^^^^^^^^^^^^^^^^^

after the change:

got message of size 312 on Thu May  8 15:44:07 2014
RTM_GET: Report Metrics: len 312, pid: 2895, seq 1, errno 0, flags:<UP,DONE,PINNED>
locks:  inits:
sockaddrs: <DST,GATEWAY,NETMASK,IFP,IFA>
 10.0.0.0 link#1 255.255.255.0 em0:8.0.27.c5.29.d4 10.0.0.92
_________________^^^^^^^^^^^^^^^^^^

Sponsored by:	Yandex LLC
MFC after:	1 month
2014-05-08 11:56:06 +00:00

1931 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_PROTO3:
flags |= RTF_PROTO3;
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)
{
struct in6_addr in6;
if (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 == 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);
}
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) {
if (errno == EPERM)
err(1, "writing to routing socket");
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"
"\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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