/* $NetBSD: ndp.c,v 1.60 2023/08/18 13:07:38 tnn Exp $ */
/* $KAME: ndp.c,v 1.121 2005/07/13 11:30:13 keiichi Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
* 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 project 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 PROJECT 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 PROJECT 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.
*/
/*
* Copyright (c) 1984, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Sun Microsystems, Inc.
*
* 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.
*/
/*
* Copyright (c) 1997
* 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: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
* Based on:
* "@(#) Copyright (c) 1984, 1993\n\
* The Regents of the University of California. All rights reserved.\n";
*
* "@(#)arp.c 8.2 (Berkeley) 1/2/94";
*/
/*
* ndp - display, set, delete and flush neighbor cache
*/
#include <sys/param.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/icmp6.h>
#include <netinet6/in6_var.h>
#include <netinet6/nd6.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <nlist.h>
#include <stdio.h>
#include <string.h>
#include <paths.h>
#include <err.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include "prog_ops.h"
static pid_t pid;
static int nflag;
static int tflag;
static int32_t thiszone; /* time difference with gmt */
static int my_s = -1;
static unsigned int repeat = 0;
static char host_buf[NI_MAXHOST]; /* getnameinfo() */
static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */
static void getsocket(void);
static int set(int, char **);
static void get(char *);
static int delete(struct rt_msghdr *, char *);
static void delete_one(char *);
static void do_foreach(struct in6_addr *, char *, int);
static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, unsigned int, int);
static char *ether_str(struct sockaddr_dl *);
static int ndp_ether_aton(char *, u_char *);
__dead static void usage(void);
static int rtmsg(int, struct rt_msghdr *);
static void ifinfo(char *, int, char **);
static const char *sec2str(time_t);
static char *ether_str(struct sockaddr_dl *);
static void ts_print(const struct timeval *);
static int32_t gmt2local(time_t t);
#define NDP_F_CLEAR 1
#define NDP_F_DELETE 2
static int mode = 0;
static char *arg = NULL;
int
main(int argc, char **argv)
{
int ch;
while ((ch = getopt(argc, argv, "acd:f:i:nstA:")) != -1)
switch (ch) {
case 'a':
case 'c':
case 's':
case 'd':
case 'f':
case 'i' :
if (mode) {
usage();
/*NOTREACHED*/
}
mode = ch;
arg = optarg;
break;
case 'n':
nflag = 1;
break;
case 't':
tflag = 1;
break;
case 'A':
if (mode) {
usage();
/*NOTREACHED*/
}
mode = 'a';
repeat = atoi(optarg);
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (prog_init && prog_init() == -1)
err(1, "init failed");
pid = prog_getpid();
thiszone = gmt2local(0L);
switch (mode) {
case 'a':
case 'c':
if (argc != 0) {
usage();
/*NOTREACHED*/
}
do_foreach(0, NULL, mode == 'c' ? NDP_F_CLEAR : 0);
break;
case 'd':
if (argc != 0) {
usage();
/*NOTREACHED*/
}
delete_one(arg);
break;
case 'i':
ifinfo(arg, argc, argv);
break;
case 's':
if (argc < 2 || argc > 4)
usage();
return(set(argc, argv) ? 1 : 0);
case 0:
if (argc != 1) {
usage();
/*NOTREACHED*/
}
get(argv[0]);
break;
}
return(0);
}
static void
makeaddr(struct sockaddr_in6 *mysin, const void *resp)
{
const struct sockaddr_in6 *res = resp;
mysin->sin6_addr = res->sin6_addr;
mysin->sin6_scope_id = res->sin6_scope_id;
inet6_putscopeid(mysin, INET6_IS_ADDR_LINKLOCAL);
}
static void
getsocket(void)
{
if (my_s < 0) {
my_s = prog_socket(PF_ROUTE, SOCK_RAW, 0);
if (my_s < 0)
err(1, "socket");
}
}
#ifdef notdef
static struct sockaddr_in6 so_mask = {
.sin6_len = sizeof(so_mask),
.sin6_family = AF_INET6
};
#endif
static struct sockaddr_in6 blank_sin = {
.sin6_len = sizeof(blank_sin),
.sin6_family = AF_INET6
};
static struct sockaddr_in6 sin_m;
static struct sockaddr_dl blank_sdl = {
.sdl_len = sizeof(blank_sdl),
.sdl_family = AF_LINK,
};
static struct sockaddr_dl sdl_m;
static int expire_time, flags, found_entry;
static struct {
struct rt_msghdr m_rtm;
char m_space[512];
} m_rtmsg;
/*
* Set an individual neighbor cache entry
*/
static int
set(int argc, char **argv)
{
register struct sockaddr_in6 *mysin = &sin_m;
register struct sockaddr_dl *sdl;
register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
struct addrinfo hints, *res;
int gai_error;
u_char *ea;
char *host = argv[0], *eaddr = argv[1];
getsocket();
argc -= 2;
argv += 2;
sdl_m = blank_sdl;
sin_m = blank_sin;
(void)memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
gai_error = getaddrinfo(host, NULL, &hints, &res);
if (gai_error) {
warnx("%s: %s", host, gai_strerror(gai_error));
return 1;
}
makeaddr(mysin, res->ai_addr);
freeaddrinfo(res);
ea = (u_char *)LLADDR(&sdl_m);
if (ndp_ether_aton(eaddr, ea) == 0)
sdl_m.sdl_alen = 6;
flags = expire_time = 0;
while (argc-- > 0) {
if (strncmp(argv[0], "temp", 4) == 0) {
struct timeval tim;
(void)gettimeofday(&tim, 0);
expire_time = tim.tv_sec + 20 * 60;
} else if (strncmp(argv[0], "proxy", 5) == 0)
flags |= RTF_ANNOUNCE;
argv++;
}
if (rtmsg(RTM_GET, NULL) < 0) {
errx(1, "RTM_GET(%s) failed", host);
/* NOTREACHED */
}
mysin = (struct sockaddr_in6 *)(void *)(rtm + 1);
sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(mysin->sin6_len) + (char *)(void *)mysin);
if (IN6_ARE_ADDR_EQUAL(&mysin->sin6_addr, &sin_m.sin6_addr)) {
if (sdl->sdl_family == AF_LINK &&
!(rtm->rtm_flags & RTF_GATEWAY)) {
switch (sdl->sdl_type) {
case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
case IFT_ISO88024: case IFT_ISO88025:
goto overwrite;
}
}
/*
* IPv4 arp command retries with sin_other = SIN_PROXY here.
*/
(void)fprintf(stderr, "set: cannot configure a new entry\n");
return 1;
}
overwrite:
if (sdl->sdl_family != AF_LINK) {
warnx("cannot intuit interface index and type for %s", host);
return (1);
}
sdl_m.sdl_type = sdl->sdl_type;
sdl_m.sdl_index = sdl->sdl_index;
return (rtmsg(RTM_ADD, NULL));
}
/*
* Display an individual neighbor cache entry
*/
static void
get(char *host)
{
struct sockaddr_in6 *mysin = &sin_m;
struct addrinfo hints, *res;
int gai_error;
sin_m = blank_sin;
(void)memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
gai_error = getaddrinfo(host, NULL, &hints, &res);
if (gai_error) {
warnx("%s: %s", host, gai_strerror(gai_error));
return;
}
makeaddr(mysin, res->ai_addr);
freeaddrinfo(res);
do_foreach(&mysin->sin6_addr, host, 0);
if (found_entry == 0) {
(void)getnameinfo((struct sockaddr *)(void *)mysin,
(socklen_t)mysin->sin6_len,
host_buf, sizeof(host_buf), NULL ,0,
(nflag ? NI_NUMERICHOST : 0));
errx(1, "%s (%s) -- no entry", host, host_buf);
}
}
static void
delete_one(char *host)
{
struct sockaddr_in6 *mysin = &sin_m;
struct addrinfo hints, *res;
int gai_error;
sin_m = blank_sin;
(void)memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
gai_error = getaddrinfo(host, NULL, &hints, &res);
if (gai_error) {
warnx("%s: %s", host, gai_strerror(gai_error));
return;
}
makeaddr(mysin, res->ai_addr);
freeaddrinfo(res);
do_foreach(&mysin->sin6_addr, host, NDP_F_DELETE);
}
/*
* Delete a neighbor cache entry
*/
static int
delete(struct rt_msghdr *rtm, char *host)
{
char delete_host_buf[NI_MAXHOST];
struct sockaddr_in6 *mysin = &sin_m;
struct sockaddr_dl *sdl;
getsocket();
mysin = (struct sockaddr_in6 *)(void *)(rtm + 1);
sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(mysin->sin6_len) +
(char *)(void *)mysin);
if (sdl->sdl_family != AF_LINK) {
(void)printf("cannot locate %s\n", host);
return (1);
}
if (rtmsg(RTM_DELETE, rtm) == 0) {
struct sockaddr_in6 s6 = *mysin; /* XXX: for safety */
s6.sin6_scope_id = 0;
inet6_putscopeid(&s6, INET6_IS_ADDR_LINKLOCAL);
(void)getnameinfo((struct sockaddr *)(void *)&s6,
(socklen_t)s6.sin6_len, delete_host_buf,
sizeof(delete_host_buf), NULL, 0,
(nflag ? NI_NUMERICHOST : 0));
(void)printf("%s (%s) deleted\n", host, delete_host_buf);
}
return 0;
}
#define W_ADDR (8 * 4 + 7)
#define W_LL 17
#define W_IF 6
/*
* Iterate on neighbor caches and do
* - dump all caches,
* - clear all caches (NDP_F_CLEAR) or
* - remove matched caches (NDP_F_DELETE)
*/
static void
do_foreach(struct in6_addr *addr, char *host, int _flags)
{
int mib[6];
size_t needed;
char *lim, *buf, *next;
struct rt_msghdr *rtm;
struct sockaddr_in6 *mysin;
struct sockaddr_dl *sdl;
struct in6_nbrinfo *nbi;
struct timeval tim;
int addrwidth;
int llwidth;
int ifwidth;
char flgbuf[8], *fl;
const char *ifname;
int cflag = _flags == NDP_F_CLEAR;
int dflag = _flags == NDP_F_DELETE;
/* Print header */
if (!tflag && !cflag)
(void)printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %2s\n",
W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
W_IF, W_IF, "Netif", "Expire", "S", "Fl");
again:;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET6;
mib[4] = NET_RT_FLAGS;
mib[5] = RTF_LLDATA;
if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(1, "sysctl(PF_ROUTE estimate)");
if (needed > 0) {
if ((buf = malloc(needed)) == NULL)
err(1, "malloc");
if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
free(buf);
if (errno == ENOBUFS)
goto again;
err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
}
lim = buf + needed;
} else
buf = lim = NULL;
for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
int isrouter = 0, prbs = 0;
rtm = (struct rt_msghdr *)(void *)next;
mysin = (struct sockaddr_in6 *)(void *)(rtm + 1);
sdl = (struct sockaddr_dl *)(void *)((char *)(void *)mysin + RT_ROUNDUP(mysin->sin6_len));
/*
* Some OSes can produce a route that has the LINK flag but
* has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
* and BSD/OS, where xx is not the interface identifier on
* lo0). Such routes entry would annoy getnbrinfo() below,
* so we skip them.
* XXX: such routes should have the GATEWAY flag, not the
* LINK flag. However, there is rotten routing software
* that advertises all routes that have the GATEWAY flag.
* Thus, KAME kernel intentionally does not set the LINK flag.
* What is to be fixed is not ndp, but such routing software
* (and the kernel workaround)...
*/
if (sdl->sdl_family != AF_LINK)
continue;
if (!(rtm->rtm_flags & RTF_HOST))
continue;
if (addr) {
if (!IN6_ARE_ADDR_EQUAL(addr, &mysin->sin6_addr))
continue;
found_entry = 1;
} else if (IN6_IS_ADDR_MULTICAST(&mysin->sin6_addr))
continue;
if (dflag) {
(void)delete(rtm, host_buf);
continue;
}
if (IN6_IS_ADDR_LINKLOCAL(&mysin->sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&mysin->sin6_addr)) {
uint16_t scopeid = mysin->sin6_scope_id;
inet6_getscopeid(mysin, INET6_IS_ADDR_LINKLOCAL|
INET6_IS_ADDR_MC_LINKLOCAL);
if (scopeid == 0)
mysin->sin6_scope_id = sdl->sdl_index;
}
(void)getnameinfo((struct sockaddr *)(void *)mysin,
(socklen_t)mysin->sin6_len,
host_buf, sizeof(host_buf), NULL, 0,
(nflag ? NI_NUMERICHOST : 0));
if (cflag) {
/* Restore scopeid */
if (IN6_IS_ADDR_LINKLOCAL(&mysin->sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&mysin->sin6_addr))
inet6_putscopeid(mysin, INET6_IS_ADDR_LINKLOCAL|
INET6_IS_ADDR_MC_LINKLOCAL);
if ((rtm->rtm_flags & RTF_STATIC) == 0)
(void)delete(rtm, host_buf);
continue;
}
(void)gettimeofday(&tim, 0);
if (tflag)
ts_print(&tim);
addrwidth = strlen(host_buf);
if (addrwidth < W_ADDR)
addrwidth = W_ADDR;
llwidth = strlen(ether_str(sdl));
if (W_ADDR + W_LL - addrwidth > llwidth)
llwidth = W_ADDR + W_LL - addrwidth;
ifname = if_indextoname((unsigned int)sdl->sdl_index, ifix_buf);
if (!ifname)
ifname = "?";
ifwidth = strlen(ifname);
if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
(void)printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth,
host_buf, llwidth, llwidth, ether_str(sdl), ifwidth,
ifwidth, ifname);
/* Print neighbor discovery specific informations */
nbi = getnbrinfo(&mysin->sin6_addr,
(unsigned int)sdl->sdl_index, 1);
if (nbi) {
if (nbi->expire > tim.tv_sec) {
(void)printf(" %-9.9s",
sec2str(nbi->expire - tim.tv_sec));
} else if (nbi->expire == 0)
(void)printf(" %-9.9s", "permanent");
else
(void)printf(" %-9.9s", "expired");
switch (nbi->state) {
case ND_LLINFO_NOSTATE:
(void)printf(" N");
break;
case ND_LLINFO_WAITDELETE:
(void)printf(" W");
break;
case ND_LLINFO_INCOMPLETE:
(void)printf(" I");
break;
case ND_LLINFO_REACHABLE:
(void)printf(" R");
break;
case ND_LLINFO_STALE:
(void)printf(" S");
break;
case ND_LLINFO_DELAY:
(void)printf(" D");
break;
case ND_LLINFO_PROBE:
(void)printf(" P");
break;
case ND_LLINFO_UNREACHABLE:
(void)printf(" U");
break;
default:
(void)printf(" ?");
break;
}
isrouter = nbi->isrouter;
prbs = nbi->asked;
} else {
warnx("failed to get neighbor information");
(void)printf(" ");
}
/*
* other flags. R: router, P: proxy, W: ??
*/
fl = flgbuf;
if (isrouter)
*fl++ = 'R';
if (rtm->rtm_flags & RTF_ANNOUNCE)
*fl++ = 'p';
*fl++ = '\0';
(void)printf(" %s", flgbuf);
if (prbs)
(void)printf(" %d", prbs);
(void)printf("\n");
}
if (buf != NULL)
free(buf);
if (repeat) {
(void)printf("\n");
(void)fflush(stdout);
(void)sleep(repeat);
goto again;
}
}
static struct in6_nbrinfo *
getnbrinfo(struct in6_addr *addr, unsigned int ifindex, int warning)
{
static struct in6_nbrinfo nbi;
int s;
if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
err(1, "socket");
(void)memset(&nbi, 0, sizeof(nbi));
(void)if_indextoname(ifindex, nbi.ifname);
nbi.addr = *addr;
if (prog_ioctl(s, SIOCGNBRINFO_IN6, &nbi) < 0) {
if (warning)
warn("ioctl(SIOCGNBRINFO_IN6)");
(void)prog_close(s);
return(NULL);
}
(void)prog_close(s);
return(&nbi);
}
static char *
ether_str(struct sockaddr_dl *sdl)
{
static char hbuf[NI_MAXHOST];
if (sdl->sdl_alen) {
if (getnameinfo((struct sockaddr *)(void *)sdl,
(socklen_t)sdl->sdl_len,
hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
(void)snprintf(hbuf, sizeof(hbuf), "<invalid>");
} else
(void)snprintf(hbuf, sizeof(hbuf), "(incomplete)");
return(hbuf);
}
static int
ndp_ether_aton(char *a, u_char *n)
{
int i, o[6];
i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
&o[3], &o[4], &o[5]);
if (i != 6) {
warnx("invalid Ethernet address '%s'", a);
return (1);
}
for (i = 0; i < 6; i++)
n[i] = o[i];
return (0);
}
static void
usage(void)
{
const char *pn = getprogname();
(void)fprintf(stderr, "Usage: %s [-nt] hostname\n", pn);
(void)fprintf(stderr,
" %s [-nt] -a | -c\n", pn);
(void)fprintf(stderr, " %s [-nt] -A wait\n", pn);
(void)fprintf(stderr, " %s [-nt] -d hostname\n", pn);
(void)fprintf(stderr, " %s [-nt] -f filename\n", pn);
(void)fprintf(stderr, " %s [-nt] -i interface [flags...]\n", pn);
(void)fprintf(stderr,
" %s [-nt] -s nodename etheraddr [temp] [proxy]\n", pn);
exit(1);
}
static int
rtmsg(int cmd, struct rt_msghdr *_rtm)
{
static int seq;
register struct rt_msghdr *rtm = _rtm;
register char *cp = m_rtmsg.m_space;
register int l;
errno = 0;
if (rtm != NULL) {
memcpy(&m_rtmsg, rtm, rtm->rtm_msglen);
rtm = &m_rtmsg.m_rtm;
goto doit;
}
(void)memset(&m_rtmsg, 0, sizeof(m_rtmsg));
rtm = &m_rtmsg.m_rtm;
rtm->rtm_flags = flags;
rtm->rtm_version = RTM_VERSION;
switch (cmd) {
default:
errx(1, "internal wrong cmd");
/*NOTREACHED*/
case RTM_ADD:
rtm->rtm_addrs |= RTA_GATEWAY;
if (expire_time) {
rtm->rtm_rmx.rmx_expire = expire_time;
rtm->rtm_inits = RTV_EXPIRE;
}
rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
#ifdef notdef /* we don't support ipv6addr/128 type proxying. */
if (rtm->rtm_flags & RTF_ANNOUNCE) {
rtm->rtm_flags &= ~RTF_HOST;
rtm->rtm_addrs |= RTA_NETMASK;
}
#endif
rtm->rtm_addrs |= RTA_DST;
break;
case RTM_GET:
rtm->rtm_flags |= RTF_LLDATA;
rtm->rtm_addrs |= RTA_DST | RTA_GATEWAY;
}
#define NEXTADDR(w, s) \
if (rtm->rtm_addrs & (w)) { \
(void)memcpy(cp, &s, sizeof(s)); \
RT_ADVANCE(cp, (struct sockaddr *)(void *)&s); \
}
NEXTADDR(RTA_DST, sin_m);
NEXTADDR(RTA_GATEWAY, sdl_m);
#ifdef notdef /* we don't support ipv6addr/128 type proxying. */
(void)memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
NEXTADDR(RTA_NETMASK, so_mask);
#endif
rtm->rtm_msglen = cp - (char *)(void *)&m_rtmsg;
doit:
l = rtm->rtm_msglen;
rtm->rtm_seq = ++seq;
rtm->rtm_type = cmd;
if (prog_write(my_s, &m_rtmsg, (size_t)l) == -1) {
if (errno != ESRCH || cmd != RTM_DELETE)
err(1, "writing to routing socket");
}
do {
l = prog_read(my_s, &m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
if (l < 0)
warn("read from routing socket");
return (0);
}
static void
ifinfo(char *ifname, int argc, char **argv)
{
struct in6_ndireq nd;
int i, s;
u_int32_t newflags;
bool valset = false, flagset = false;
if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
err(1, "socket");
(void)memset(&nd, 0, sizeof(nd));
(void)strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0)
err(1, "ioctl(SIOCGIFINFO_IN6)");
#define ND nd.ndi
newflags = ND.flags;
for (i = 0; i < argc; i++) {
int clear = 0;
char *cp = argv[i];
if (*cp == '-') {
clear = 1;
cp++;
}
#define SETFLAG(s, f) \
do {\
if (strcmp(cp, (s)) == 0) {\
if (clear)\
newflags &= ~(f);\
else\
newflags |= (f);\
flagset = true; \
}\
} while (0)
/*
* XXX: this macro is not 100% correct, in that it matches "nud" against
* "nudbogus". But we just let it go since this is minor.
*/
#define SETVALUE(f, v) \
do { \
char *valptr; \
unsigned long newval; \
v = 0; /* unspecified */ \
if (strncmp(cp, f, strlen(f)) == 0) { \
valptr = strchr(cp, '='); \
if (valptr == NULL) \
err(1, "syntax error in %s field", (f)); \
errno = 0; \
newval = strtoul(++valptr, NULL, 0); \
if (errno) \
err(1, "syntax error in %s's value", (f)); \
v = newval; \
valset = true; \
} \
} while (0)
#ifdef ND6_IFF_IFDISABLED
SETFLAG("disabled", ND6_IFF_IFDISABLED);
#endif
SETFLAG("nud", ND6_IFF_PERFORMNUD);
#ifdef ND6_IFF_ACCEPT_RTADV
SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
#endif
#ifdef ND6_IFF_OVERRIDE_RTADV
SETFLAG("override_rtadv", ND6_IFF_OVERRIDE_RTADV);
#endif
#ifdef ND6_IFF_AUTO_LINKLOCAL
SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
#endif
#ifdef ND6_IFF_PREFER_SOURCE
SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
#endif
#ifdef ND6_IFF_DONT_SET_IFROUTE
SETFLAG("dont_set_ifroute", ND6_IFF_DONT_SET_IFROUTE);
#endif
SETVALUE("basereachable", ND.basereachable);
SETVALUE("retrans", ND.retrans);
SETVALUE("curhlim", ND.chlim);
ND.flags = newflags;
#ifdef SIOCSIFINFO_IN6
if (valset && prog_ioctl(s, SIOCSIFINFO_IN6, &nd) < 0)
err(1, "ioctl(SIOCSIFINFO_IN6)");
#endif
if (flagset && prog_ioctl(s, SIOCSIFINFO_FLAGS, &nd) < 0)
err(1, "ioctl(SIOCSIFINFO_FLAGS)");
#undef SETFLAG
#undef SETVALUE
}
if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0)
err(1, "ioctl(SIOCGIFINFO_IN6)");
(void)printf("curhlim=%d", ND.chlim);
(void)printf(", basereachable=%ds%dms",
ND.basereachable / 1000, ND.basereachable % 1000);
(void)printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
if (ND.flags) {
(void)printf("\nFlags: ");
if ((ND.flags & ND6_IFF_PERFORMNUD))
(void)printf("nud ");
#ifdef ND6_IFF_IFDISABLED
if ((ND.flags & ND6_IFF_IFDISABLED))
(void)printf("disabled ");
#endif
#ifdef ND6_IFF_AUTO_LINKLOCAL
if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
(void)printf("auto_linklocal ");
#endif
#ifdef ND6_IFF_PREFER_SOURCE
if ((ND.flags & ND6_IFF_PREFER_SOURCE))
(void)printf("prefer_source ");
#endif
}
(void)putc('\n', stdout);
#undef ND
(void)prog_close(s);
}
static const char *
sec2str(time_t total)
{
static char result[256];
int days, hours, mins, secs;
int first = 1;
char *p = result;
char *ep = &result[sizeof(result)];
int n;
days = total / 3600 / 24;
hours = (total / 3600) % 24;
mins = (total / 60) % 60;
secs = total % 60;
if (days) {
first = 0;
n = snprintf(p, (size_t)(ep - p), "%dd", days);
if (n < 0 || n >= ep - p)
return "?";
p += n;
}
if (!first || hours) {
first = 0;
n = snprintf(p, (size_t)(ep - p), "%dh", hours);
if (n < 0 || n >= ep - p)
return "?";
p += n;
}
if (!first || mins) {
first = 0;
n = snprintf(p, (size_t)(ep - p), "%dm", mins);
if (n < 0 || n >= ep - p)
return "?";
p += n;
}
(void)snprintf(p, (size_t)(ep - p), "%ds", secs);
return(result);
}
/*
* Print the timestamp
* from tcpdump/util.c
*/
static void
ts_print(const struct timeval *tvp)
{
int s;
/* Default */
s = (tvp->tv_sec + thiszone) % 86400;
(void)printf("%02d:%02d:%02d.%06u ",
s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
}
/*
* Returns the difference between gmt and local time in seconds.
* Use gmtime() and localtime() to keep things simple.
*/
static int32_t
gmt2local(time_t t)
{
int dt, dir;
struct tm *gmt, *loc;
struct tm sgmt;
if (t == 0)
t = time(NULL);
gmt = &sgmt;
*gmt = *gmtime(&t);
loc = localtime(&t);
dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
(loc->tm_min - gmt->tm_min) * 60;
/*
* If the year or julian day is different, we span 00:00 GMT
* and must add or subtract a day. Check the year first to
* avoid problems when the julian day wraps.
*/
dir = loc->tm_year - gmt->tm_year;
if (dir == 0)
dir = loc->tm_yday - gmt->tm_yday;
dt += dir * 24 * 60 * 60;
return (dt);
}
