712 lines
16 KiB
C
712 lines
16 KiB
C
/* $NetBSD: arp.c,v 1.33 2002/02/28 22:43:42 pooka Exp $ */
|
|
|
|
/*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__COPYRIGHT("@(#) Copyright (c) 1984, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n");
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)arp.c 8.3 (Berkeley) 4/28/95";
|
|
#else
|
|
__RCSID("$NetBSD: arp.c,v 1.33 2002/02/28 22:43:42 pooka Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* arp - display, set, and delete arp table entries
|
|
*/
|
|
|
|
/* Roundup the same way rt_xaddrs does */
|
|
#define ROUNDUP(a) \
|
|
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/file.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_dl.h>
|
|
#include <net/if_ether.h>
|
|
#include <net/if_types.h>
|
|
#include <net/route.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/if_inarp.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <netdb.h>
|
|
#include <nlist.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
int delete __P((const char *, const char *));
|
|
void dump __P((u_long));
|
|
void delete_all __P((void));
|
|
void sdl_print __P((const struct sockaddr_dl *));
|
|
int getifname __P((u_int16_t, char *));
|
|
int atosdl __P((const char *s, struct sockaddr_dl *sdl));
|
|
int file __P((char *));
|
|
void get __P((const char *));
|
|
int getinetaddr __P((const char *, struct in_addr *));
|
|
void getsocket __P((void));
|
|
int main __P((int, char **));
|
|
int rtmsg __P((int));
|
|
int set __P((int, char **));
|
|
void usage __P((void));
|
|
|
|
static int pid;
|
|
static int aflag, nflag, vflag;
|
|
static int s = -1;
|
|
static int is = -1;
|
|
|
|
static struct ifconf ifc;
|
|
static char ifconfbuf[8192];
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
int ch;
|
|
int op = 0;
|
|
|
|
pid = getpid();
|
|
|
|
while ((ch = getopt(argc, argv, "andsfv")) != -1)
|
|
switch((char)ch) {
|
|
case 'a':
|
|
aflag = 1;
|
|
break;
|
|
case 'd':
|
|
case 's':
|
|
case 'f':
|
|
if (op)
|
|
usage();
|
|
op = ch;
|
|
break;
|
|
case 'n':
|
|
nflag = 1;
|
|
break;
|
|
case 'v':
|
|
vflag = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (!op && aflag)
|
|
op = 'a';
|
|
|
|
switch((char)op) {
|
|
case 'a':
|
|
dump(0);
|
|
break;
|
|
case 'd':
|
|
if (aflag && argc == 0)
|
|
delete_all();
|
|
else {
|
|
if (aflag || argc < 1 || argc > 2)
|
|
usage();
|
|
(void)delete(argv[0], argv[1]);
|
|
}
|
|
break;
|
|
case 's':
|
|
if (argc < 2 || argc > 5)
|
|
usage();
|
|
return (set(argc, argv) ? 1 : 0);
|
|
case 'f':
|
|
if (argc != 1)
|
|
usage();
|
|
return (file(argv[0]));
|
|
default:
|
|
if (argc != 1)
|
|
usage();
|
|
get(argv[0]);
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Process a file to set standard arp entries
|
|
*/
|
|
int
|
|
file(name)
|
|
char *name;
|
|
{
|
|
char line[100], arg[5][50], *args[5];
|
|
int i, retval;
|
|
FILE *fp;
|
|
|
|
if ((fp = fopen(name, "r")) == NULL)
|
|
err(1, "cannot open %s", name);
|
|
args[0] = &arg[0][0];
|
|
args[1] = &arg[1][0];
|
|
args[2] = &arg[2][0];
|
|
args[3] = &arg[3][0];
|
|
args[4] = &arg[4][0];
|
|
retval = 0;
|
|
while (fgets(line, 100, fp) != NULL) {
|
|
i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
|
|
arg[3], arg[4]);
|
|
if (i < 2) {
|
|
warnx("bad line: %s", line);
|
|
retval = 1;
|
|
continue;
|
|
}
|
|
if (set(i, args))
|
|
retval = 1;
|
|
}
|
|
fclose(fp);
|
|
return (retval);
|
|
}
|
|
|
|
void
|
|
getsocket()
|
|
{
|
|
if (s >= 0)
|
|
return;
|
|
s = socket(PF_ROUTE, SOCK_RAW, 0);
|
|
if (s < 0)
|
|
err(1, "socket");
|
|
}
|
|
|
|
struct sockaddr_in so_mask = {8, 0, 0, { 0xffffffff}};
|
|
struct sockaddr_inarp blank_sin = {sizeof(blank_sin), AF_INET }, sin_m;
|
|
struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
|
|
int expire_time, flags, export_only, doing_proxy, found_entry;
|
|
struct {
|
|
struct rt_msghdr m_rtm;
|
|
char m_space[512];
|
|
} m_rtmsg;
|
|
|
|
/*
|
|
* Set an individual arp entry
|
|
*/
|
|
int
|
|
set(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
struct sockaddr_inarp *sin;
|
|
struct sockaddr_dl *sdl;
|
|
struct rt_msghdr *rtm;
|
|
char *host = argv[0], *eaddr;
|
|
int rval;
|
|
|
|
sin = &sin_m;
|
|
rtm = &(m_rtmsg.m_rtm);
|
|
eaddr = argv[1];
|
|
|
|
getsocket();
|
|
argc -= 2;
|
|
argv += 2;
|
|
sdl_m = blank_sdl; /* struct copy */
|
|
sin_m = blank_sin; /* struct copy */
|
|
if (getinetaddr(host, &sin->sin_addr) == -1)
|
|
return (1);
|
|
if (atosdl(eaddr, &sdl_m))
|
|
warnx("invalid link-level address '%s'", eaddr);
|
|
doing_proxy = flags = export_only = expire_time = 0;
|
|
while (argc-- > 0) {
|
|
if (strncmp(argv[0], "temp", 4) == 0) {
|
|
struct timeval time;
|
|
(void)gettimeofday(&time, 0);
|
|
expire_time = time.tv_sec + 20 * 60;
|
|
}
|
|
else if (strncmp(argv[0], "pub", 3) == 0) {
|
|
flags |= RTF_ANNOUNCE;
|
|
doing_proxy = SIN_PROXY;
|
|
} else if (strncmp(argv[0], "trail", 5) == 0) {
|
|
(void)printf(
|
|
"%s: Sending trailers is no longer supported\n",
|
|
host);
|
|
}
|
|
argv++;
|
|
}
|
|
tryagain:
|
|
if (rtmsg(RTM_GET) < 0) {
|
|
warn("%s", host);
|
|
return (1);
|
|
}
|
|
sin = (struct sockaddr_inarp *)(rtm + 1);
|
|
sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin_len) + (char *)sin);
|
|
if (sin->sin_addr.s_addr == sin_m.sin_addr.s_addr) {
|
|
if (sdl->sdl_family == AF_LINK &&
|
|
(rtm->rtm_flags & RTF_LLINFO) &&
|
|
!(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
|
|
case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
|
|
case IFT_ISO88024: case IFT_ISO88025: case IFT_ARCNET:
|
|
goto overwrite;
|
|
}
|
|
if (doing_proxy == 0) {
|
|
(void)printf("set: can only proxy for %s\n", host);
|
|
return (1);
|
|
}
|
|
if (sin_m.sin_other & SIN_PROXY) {
|
|
(void)printf(
|
|
"set: proxy entry exists for non 802 device\n");
|
|
return (1);
|
|
}
|
|
sin_m.sin_other = SIN_PROXY;
|
|
export_only = 1;
|
|
goto tryagain;
|
|
}
|
|
overwrite:
|
|
if (sdl->sdl_family != AF_LINK) {
|
|
(void)printf("cannot intuit interface index and type for %s\n",
|
|
host);
|
|
return (1);
|
|
}
|
|
sdl_m.sdl_type = sdl->sdl_type;
|
|
sdl_m.sdl_index = sdl->sdl_index;
|
|
rval = rtmsg(RTM_ADD);
|
|
if (vflag)
|
|
(void)printf("%s (%s) added\n", host, eaddr);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Display an individual arp entry
|
|
*/
|
|
void
|
|
get(host)
|
|
const char *host;
|
|
{
|
|
struct sockaddr_inarp *sin;
|
|
|
|
sin = &sin_m;
|
|
sin_m = blank_sin; /* struct copy */
|
|
if (getinetaddr(host, &sin->sin_addr) == -1)
|
|
exit(1);
|
|
dump(sin->sin_addr.s_addr);
|
|
if (found_entry == 0) {
|
|
(void)printf("%s (%s) -- no entry\n", host,
|
|
inet_ntoa(sin->sin_addr));
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete an arp entry
|
|
*/
|
|
int
|
|
delete(host, info)
|
|
const char *host;
|
|
const char *info;
|
|
{
|
|
struct sockaddr_inarp *sin;
|
|
struct rt_msghdr *rtm;
|
|
struct sockaddr_dl *sdl;
|
|
|
|
sin = &sin_m;
|
|
rtm = &m_rtmsg.m_rtm;
|
|
|
|
if (info && strncmp(info, "pro", 3) )
|
|
export_only = 1;
|
|
getsocket();
|
|
sin_m = blank_sin; /* struct copy */
|
|
if (getinetaddr(host, &sin->sin_addr) == -1)
|
|
return (1);
|
|
tryagain:
|
|
if (rtmsg(RTM_GET) < 0) {
|
|
warn("%s", host);
|
|
return (1);
|
|
}
|
|
sin = (struct sockaddr_inarp *)(rtm + 1);
|
|
sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin_len) + (char *)sin);
|
|
if (sin->sin_addr.s_addr == sin_m.sin_addr.s_addr) {
|
|
if (sdl->sdl_family == AF_LINK &&
|
|
(rtm->rtm_flags & RTF_LLINFO) &&
|
|
!(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
|
|
case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
|
|
case IFT_ISO88024: case IFT_ISO88025: case IFT_ARCNET:
|
|
goto delete;
|
|
}
|
|
}
|
|
if (sin_m.sin_other & SIN_PROXY) {
|
|
warnx("delete: can't locate %s", host);
|
|
return (1);
|
|
} else {
|
|
sin_m.sin_other = SIN_PROXY;
|
|
goto tryagain;
|
|
}
|
|
delete:
|
|
if (sdl->sdl_family != AF_LINK) {
|
|
(void)printf("cannot locate %s\n", host);
|
|
return (1);
|
|
}
|
|
if (rtmsg(RTM_DELETE))
|
|
return (1);
|
|
if (vflag)
|
|
(void)printf("%s (%s) deleted\n", host,
|
|
inet_ntoa(sin->sin_addr));
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Dump the entire arp table
|
|
*/
|
|
void
|
|
dump(addr)
|
|
u_long addr;
|
|
{
|
|
int mib[6];
|
|
size_t needed;
|
|
char ifname[IFNAMSIZ];
|
|
char *host, *lim, *buf, *next;
|
|
struct rt_msghdr *rtm;
|
|
struct sockaddr_inarp *sin;
|
|
struct sockaddr_dl *sdl;
|
|
struct hostent *hp;
|
|
|
|
mib[0] = CTL_NET;
|
|
mib[1] = PF_ROUTE;
|
|
mib[2] = 0;
|
|
mib[3] = AF_INET;
|
|
mib[4] = NET_RT_FLAGS;
|
|
mib[5] = RTF_LLINFO;
|
|
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
|
|
err(1, "route-sysctl-estimate");
|
|
if (needed == 0)
|
|
return;
|
|
if ((buf = malloc(needed)) == NULL)
|
|
err(1, "malloc");
|
|
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
|
|
err(1, "actual retrieval of routing table");
|
|
lim = buf + needed;
|
|
for (next = buf; next < lim; next += rtm->rtm_msglen) {
|
|
rtm = (struct rt_msghdr *)next;
|
|
sin = (struct sockaddr_inarp *)(rtm + 1);
|
|
sdl = (struct sockaddr_dl *)
|
|
(ROUNDUP(sin->sin_len) + (char *)sin);
|
|
if (addr) {
|
|
if (addr != sin->sin_addr.s_addr)
|
|
continue;
|
|
found_entry = 1;
|
|
}
|
|
if (nflag == 0)
|
|
hp = gethostbyaddr((caddr_t)&(sin->sin_addr),
|
|
sizeof sin->sin_addr, AF_INET);
|
|
else
|
|
hp = NULL;
|
|
|
|
host = hp ? hp->h_name : "?";
|
|
|
|
(void)printf("%s (%s) at ", host, inet_ntoa(sin->sin_addr));
|
|
if (sdl->sdl_alen)
|
|
sdl_print(sdl);
|
|
else
|
|
(void)printf("(incomplete)");
|
|
|
|
if (sdl->sdl_index) {
|
|
if (getifname(sdl->sdl_index, ifname) == 0)
|
|
printf(" on %s", ifname);
|
|
}
|
|
|
|
if (rtm->rtm_rmx.rmx_expire == 0)
|
|
(void)printf(" permanent");
|
|
if (sin->sin_other & SIN_PROXY)
|
|
(void)printf(" published (proxy only)");
|
|
if (rtm->rtm_addrs & RTA_NETMASK) {
|
|
sin = (struct sockaddr_inarp *)
|
|
(ROUNDUP(sdl->sdl_len) + (char *)sdl);
|
|
if (sin->sin_addr.s_addr == 0xffffffff)
|
|
(void)printf(" published");
|
|
if (sin->sin_len != 8)
|
|
(void)printf("(weird)");
|
|
}
|
|
(void)printf("\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete the entire arp table
|
|
*/
|
|
void
|
|
delete_all(void)
|
|
{
|
|
int mib[6];
|
|
size_t needed;
|
|
char addr[sizeof("000.000.000.000\0")];
|
|
char *lim, *buf, *next;
|
|
struct rt_msghdr *rtm;
|
|
struct sockaddr_inarp *sin;
|
|
struct sockaddr_dl *sdl;
|
|
|
|
mib[0] = CTL_NET;
|
|
mib[1] = PF_ROUTE;
|
|
mib[2] = 0;
|
|
mib[3] = AF_INET;
|
|
mib[4] = NET_RT_FLAGS;
|
|
mib[5] = RTF_LLINFO;
|
|
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
|
|
err(1, "route-sysctl-estimate");
|
|
if (needed == 0)
|
|
return;
|
|
if ((buf = malloc(needed)) == NULL)
|
|
err(1, "malloc");
|
|
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
|
|
err(1, "actual retrieval of routing table");
|
|
lim = buf + needed;
|
|
for (next = buf; next < lim; next += rtm->rtm_msglen) {
|
|
rtm = (struct rt_msghdr *)next;
|
|
sin = (struct sockaddr_inarp *)(rtm + 1);
|
|
sdl = (struct sockaddr_dl *)
|
|
(ROUNDUP(sin->sin_len) + (char *)sin);
|
|
snprintf(addr, sizeof(addr), "%s", inet_ntoa(sin->sin_addr));
|
|
delete(addr, NULL);
|
|
}
|
|
}
|
|
|
|
void
|
|
sdl_print(sdl)
|
|
const struct sockaddr_dl *sdl;
|
|
{
|
|
char hbuf[NI_MAXHOST];
|
|
|
|
if (getnameinfo((struct sockaddr *)sdl, sdl->sdl_len,
|
|
hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
|
|
printf("<invalid>");
|
|
else
|
|
printf("%s", hbuf);
|
|
}
|
|
|
|
int
|
|
atosdl(s, sdl)
|
|
const char *s;
|
|
struct sockaddr_dl *sdl;
|
|
{
|
|
int i;
|
|
long b;
|
|
caddr_t endp;
|
|
caddr_t p;
|
|
char *t, *r;
|
|
|
|
p = LLADDR(sdl);
|
|
endp = ((caddr_t)sdl) + sdl->sdl_len;
|
|
i = 0;
|
|
|
|
b = strtol(s, &t, 16);
|
|
if (t == s)
|
|
return 1;
|
|
|
|
*p++ = b;
|
|
++i;
|
|
while ((p < endp) && (*t++ == ':')) {
|
|
b = strtol(t, &r, 16);
|
|
if (r == t)
|
|
break;
|
|
*p++ = b;
|
|
++i;
|
|
t = r;
|
|
}
|
|
sdl->sdl_alen = i;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
const char *progname;
|
|
|
|
progname = getprogname();
|
|
(void)fprintf(stderr, "usage: %s [-n] hostname\n", progname);
|
|
(void)fprintf(stderr, "usage: %s [-n] -a\n", progname);
|
|
(void)fprintf(stderr, "usage: %s -d [-a|hostname]\n", progname);
|
|
(void)fprintf(stderr,
|
|
"usage: %s -s hostname ether_addr [temp] [pub]\n", progname);
|
|
(void)fprintf(stderr, "usage: %s -f filename\n", progname);
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
rtmsg(cmd)
|
|
int cmd;
|
|
{
|
|
static int seq;
|
|
int rlen;
|
|
struct rt_msghdr *rtm;
|
|
char *cp;
|
|
int l;
|
|
|
|
rtm = &m_rtmsg.m_rtm;
|
|
cp = m_rtmsg.m_space;
|
|
errno = 0;
|
|
|
|
if (cmd == RTM_DELETE)
|
|
goto doit;
|
|
(void)memset(&m_rtmsg, 0, sizeof(m_rtmsg));
|
|
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;
|
|
rtm->rtm_rmx.rmx_expire = expire_time;
|
|
rtm->rtm_inits = RTV_EXPIRE;
|
|
rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
|
|
sin_m.sin_other = 0;
|
|
if (doing_proxy) {
|
|
if (export_only)
|
|
sin_m.sin_other = SIN_PROXY;
|
|
else {
|
|
rtm->rtm_addrs |= RTA_NETMASK;
|
|
rtm->rtm_flags &= ~RTF_HOST;
|
|
}
|
|
}
|
|
/* FALLTHROUGH */
|
|
case RTM_GET:
|
|
rtm->rtm_addrs |= RTA_DST;
|
|
}
|
|
|
|
#define NEXTADDR(w, s) \
|
|
if (rtm->rtm_addrs & (w)) { \
|
|
(void)memcpy(cp, &s, ((struct sockaddr *)&s)->sa_len); \
|
|
cp += ROUNDUP(((struct sockaddr *)&s)->sa_len); \
|
|
}
|
|
|
|
NEXTADDR(RTA_DST, sin_m);
|
|
NEXTADDR(RTA_GATEWAY, sdl_m);
|
|
NEXTADDR(RTA_NETMASK, so_mask);
|
|
|
|
rtm->rtm_msglen = cp - (char *)&m_rtmsg;
|
|
doit:
|
|
l = rtm->rtm_msglen;
|
|
rtm->rtm_seq = ++seq;
|
|
rtm->rtm_type = cmd;
|
|
if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
|
|
if (errno != ESRCH || cmd != RTM_DELETE) {
|
|
warn("writing to routing socket");
|
|
return (-1);
|
|
}
|
|
}
|
|
do {
|
|
l = read(s, (char *)&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);
|
|
}
|
|
|
|
int
|
|
getinetaddr(host, inap)
|
|
const char *host;
|
|
struct in_addr *inap;
|
|
{
|
|
struct hostent *hp;
|
|
|
|
if (inet_aton(host, inap) == 1)
|
|
return (0);
|
|
if ((hp = gethostbyname(host)) == NULL) {
|
|
warnx("%s: %s", host, hstrerror(h_errno));
|
|
return (-1);
|
|
}
|
|
(void)memcpy(inap, hp->h_addr, sizeof(*inap));
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
getifname(ifindex, ifname)
|
|
u_int16_t ifindex;
|
|
char* ifname;
|
|
{
|
|
int i, idx, siz;
|
|
char ifrbuf[8192];
|
|
struct ifreq ifreq, *ifr;
|
|
const struct sockaddr_dl *sdl = NULL;
|
|
|
|
if (is < 0) {
|
|
is = socket(PF_INET, SOCK_DGRAM, 0);
|
|
if (is < 0)
|
|
err(1, "socket");
|
|
|
|
ifc.ifc_len = sizeof(ifconfbuf);
|
|
ifc.ifc_buf = ifconfbuf;
|
|
|
|
if (ioctl(is, SIOCGIFCONF, &ifc) < 0) {
|
|
close(is);
|
|
err(1, "SIOCGIFCONF");
|
|
is = -1;
|
|
}
|
|
}
|
|
|
|
ifr = ifc.ifc_req;
|
|
ifreq.ifr_name[0] = '\0';
|
|
for (i = 0, idx = 0; i < ifc.ifc_len; ) {
|
|
ifr = (struct ifreq *)((caddr_t)ifc.ifc_req + i);
|
|
siz = sizeof(ifr->ifr_name) +
|
|
(ifr->ifr_addr.sa_len > sizeof(struct sockaddr)
|
|
? ifr->ifr_addr.sa_len
|
|
: sizeof(struct sockaddr));
|
|
i += siz;
|
|
/* avoid alignment issue */
|
|
if (sizeof(ifrbuf) < siz)
|
|
errx(1, "ifr too big");
|
|
|
|
memcpy(ifrbuf, ifr, siz);
|
|
ifr = (struct ifreq *)ifrbuf;
|
|
|
|
if (ifr->ifr_addr.sa_family != AF_LINK)
|
|
continue;
|
|
|
|
sdl = (const struct sockaddr_dl *) &ifr->ifr_addr;
|
|
if (sdl && sdl->sdl_index == ifindex) {
|
|
(void) strncpy(ifname, ifr->ifr_name, IFNAMSIZ);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|