1 /* $FreeBSD: src/usr.sbin/gifconfig/gifconfig.c,v 1.2.2.4 2002/08/30 14:23:39 sobomax Exp $ */
2 /* $KAME: gifconfig.c,v 1.14 2001/01/01 04:04:56 jinmei Exp $ */
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * gifconfig, derived from ifconfig
40 * @(#) Copyright (c) 1983, 1993\n\
41 * The Regents of the University of California. All rights reserved.\n
43 * @(#)ifconfig.c 8.2 (Berkeley) 2/16/94
47 * 951109 - Andrew@pubnix.net - Changed to iterative buffer growing mechanism
48 * for ifconfig -a so all interfaces are queried.
50 * 960101 - peter@freebsd.org - Blow away the SIOCGIFCONF code and use
51 * sysctl() to get the structured interface conf
52 * and parse the messages in there. REALLY UGLY!
55 #include <sys/param.h>
56 #include <sys/socket.h>
57 #include <sys/ioctl.h>
58 #include <sys/sysctl.h>
61 #if defined(__DragonFly__)
62 #include <net/if_var.h>
63 #endif /* __DragonFly__ */
64 #include <net/if_dl.h>
65 #include <net/if_types.h>
66 #include <net/route.h>
67 #include <netinet/in.h>
68 #include <netinet/in_var.h>
69 #include <arpa/inet.h>
72 #include <sys/protosw.h>
86 struct ifaliasreq addreq;
88 struct in6_ifreq in6_ifr;
89 struct in6_aliasreq in6_addreq;
102 char ntop_buf[INET6_ADDRSTRLEN]; /*inet_ntop()*/
105 void setifpsrc(char *, int);
106 void setifpdst(char *, int);
107 void setifflags(char *, int);
108 #ifdef SIOCDIFPHYADDR
109 void delifaddrs(char *, int);
112 #define NEXTARG 0xffffff
116 int c_parameter; /* NEXTARG means next argv */
117 void (*c_func)(char *, int);
119 { "up", IFF_UP, setifflags } ,
120 { "down", -IFF_UP, setifflags },
121 #ifdef SIOCDIFPHYADDR
122 { "delete", 0, delifaddrs },
129 * XNS support liberally adapted from code written at the University of
130 * Maryland principally by James O'Toole and Chris Torek.
132 int main(int, char *[]);
134 void phys_status(int);
137 void in6_status(int);
139 void ether_status(int);
141 void in_getaddr(char *, int);
143 void in6_getaddr(char *, int);
144 void in6_getprefix(char *, int);
146 void printb(char *, unsigned int, char *);
147 int prefix(void *, int);
149 char ntop_buf[INET6_ADDRSTRLEN];
151 /* Known address families */
155 void (*af_status)(int);
156 void (*af_getaddr)(char *, int);
157 void (*af_getprefix)(char *, int);
162 #define C(x) ((caddr_t) &x)
163 { "inet", AF_INET, in_status, in_getaddr, 0,
164 SIOCSIFPHYADDR, C(addreq), C(ifr) },
166 { "inet6", AF_INET6, in6_status, in6_getaddr, in6_getprefix,
167 SIOCSIFPHYADDR_IN6, C(in6_addreq), C(in6_ifr) },
169 { "ether", AF_INET, ether_status, NULL, NULL }, /* XXX not real!! */
173 struct afswtch *afp = NULL; /*the address family being set or asked about*/
175 void rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *);
176 int ifconfig(int argc, char *argv[], int af, struct afswtch *rafp);
181 * Expand the compacted form of addresses as returned via the
182 * configuration read via sysctl().
186 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
187 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
190 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
195 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info));
196 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
197 if ((rtinfo->rti_addrs & (1 << i)) == 0)
199 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
206 * Grunge for new-style sysctl() decoding.. :-(
207 * Apologies to the world for committing gross things like this in 1996..
209 struct if_msghdr *ifm;
210 struct ifa_msghdr *ifam;
211 struct sockaddr_dl *sdl;
212 struct rt_addrinfo info;
213 char *buf, *lim, *next;
217 main(int argc, char **argv)
220 struct afswtch *rafp = NULL;
227 "usage: gifconfig interface [af] [physsrc physdst]\n");
228 #ifdef SIOCDIFPHYADDR
230 " gifconfig interface delete\n");
237 strncpy(name, *argv, sizeof(name));
238 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
241 for (afp = rafp = afs; rafp->af_name; rafp++)
242 if (strcmp(rafp->af_name, *argv) == 0) {
243 afp = rafp; argc--; argv++;
247 af = ifr.ifr_addr.sa_family = rafp->af_af;
253 mib[3] = 0; /* address family */
254 mib[4] = NET_RT_IFLIST;
257 /* if particular family specified, only ask about it */
262 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
263 errx(1, "iflist-sysctl-estimate");
264 if ((buf = malloc(needed)) == NULL)
266 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
267 errx(1, "actual retrieval of interface table");
271 if (strcmp(name, "-a") == 0)
272 all = 1; /* All interfaces */
273 else if (strcmp(name, "-au") == 0)
274 all = 2; /* All IFF_UPinterfaces */
275 else if (strcmp(name, "-ad") == 0)
276 all = 3; /* All !IFF_UP interfaces */
278 for (next = buf; next < lim; next += ifm->ifm_msglen) {
280 ifm = (struct if_msghdr *)next;
282 /* XXX: Swallow up leftover NEWADDR messages */
283 if (ifm->ifm_type == RTM_NEWADDR)
286 if (ifm->ifm_type == RTM_IFINFO) {
287 sdl = (struct sockaddr_dl *)(ifm + 1);
288 flags = ifm->ifm_flags;
290 errx(1, "out of sync parsing NET_RT_IFLIST");
296 if (strlen(name) != sdl->sdl_nlen)
297 continue; /* not same len */
298 if (strncmp(name, sdl->sdl_data, sdl->sdl_nlen) != 0)
299 continue; /* not same name */
302 break; /* always do it */
304 if ((flags & IFF_UP) == 0)
305 continue; /* not up */
309 continue; /* not down */
314 * Let's just do it for gif only
316 if (sdl->sdl_type != IFT_GIF) {
320 fprintf(stderr, "gifconfig: %s is not gif.\n",
326 strncpy(name, sdl->sdl_data, sdl->sdl_nlen);
327 name[sdl->sdl_nlen] = '\0';
330 if ((s = socket(af, SOCK_DGRAM, 0)) < 0) {
331 perror("gifconfig: socket");
335 ifconfig(argc,argv,af,rafp);
340 all = -1; /* flag it as 'done' */
347 errx(1, "interface %s does not exist", name);
355 ifconfig(int argc, char **argv, int af, struct afswtch *rafp)
360 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
362 strncpy(in6_ifr.ifr_name, name, sizeof in6_ifr.ifr_name);
365 if (ioctl(s, SIOCGIFMETRIC, (caddr_t)&ifr) < 0)
366 perror("ioctl (SIOCGIFMETRIC)");
368 metric = ifr.ifr_metric;
370 #if defined(SIOCGIFMTU) && !defined(__OpenBSD__)
371 if (ioctl(s, SIOCGIFMTU, (caddr_t)&ifr) < 0)
372 perror("ioctl (SIOCGIFMTU)");
387 for (p = cmds; p->c_name; p++)
388 if (strcmp(*argv, p->c_name) == 0)
390 if (p->c_name == NULL && setpsrc)
391 p++; /* got src, do dst */
393 if (p->c_parameter == NEXTARG) {
395 errx(1, "'%s' requires argument",
397 (*p->c_func)(argv[1], 0);
400 (*p->c_func)(*argv, p->c_parameter);
405 strncpy(rafp->af_addreq, name, sizeof ifr.ifr_name);
406 if (ioctl(s, rafp->af_pifaddr, rafp->af_addreq) < 0)
407 Perror("ioctl (SIOCSIFPHYADDR)");
410 errx(1, "destination is not specified");
419 setifpsrc(char *addr, int param)
421 param = 0; /*fool gcc*/
422 (*afp->af_getaddr)(addr, PSRC);
428 setifpdst(char *addr, int param)
430 param = 0; /*fool gcc*/
431 (*afp->af_getaddr)(addr, PDST);
436 setifflags(char *vname, int value)
438 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
439 Perror("ioctl (SIOCGIFFLAGS)");
442 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
443 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
450 ifr.ifr_flags = flags & 0xffff;
451 ifr.ifr_flagshigh = flags >> 16;
452 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0)
456 #ifdef SIOCDIFPHYADDR
459 delifaddrs(char *vname, int param)
461 param = 0; /* fool gcc */
462 vname = NULL; /* ditto */
464 if (ioctl(s, SIOCDIFPHYADDR, (caddr_t)&ifr) < 0)
465 err(1, "ioctl(SIOCDIFPHYADDR)");
470 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6NOTRAILERS\7RUNNING\10NOARP\
471 \11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2\20MULTICAST"
474 * Print the status of the interface. If an address family was
475 * specified, show it and it only; otherwise, show them all.
480 struct afswtch *p = NULL;
482 struct if_msghdr *myifm;
484 printf("%s: ", name);
485 printb("flags", flags, IFFBITS);
487 printf(" metric %d", metric);
489 printf(" mtu %d", mtu);
493 * XXX: Sigh. This is bad, I know. At this point, we may have
494 * *zero* RTM_NEWADDR's, so we have to "feel the water" before
495 * incrementing the loop. One day, I might feel inspired enough
496 * to get the top level loop to pass a count down here so we
497 * dont have to mess with this. -Peter
503 mynext = next + ifm->ifm_msglen;
508 myifm = (struct if_msghdr *)mynext;
510 if (myifm->ifm_type != RTM_NEWADDR)
515 ifm = (struct if_msghdr *)next;
517 ifam = (struct ifa_msghdr *)myifm;
518 info.rti_addrs = ifam->ifam_addrs;
520 /* Expand the compacted addresses */
521 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam,
525 if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family &&
526 afp->af_status != ether_status) {
528 if (p->af_status != ether_status)
531 } else for (p = afs; p->af_name; p++) {
532 if (p->af_af == info.rti_info[RTAX_IFA]->sa_family &&
533 p->af_status != ether_status)
537 if (afp == NULL || afp->af_status == ether_status)
539 else if (afp && !p) {
540 warnx("%s has no %s IFA address!", name, afp->af_name);
547 phys_status(int force)
551 int flags = NI_NUMERICHOST;
553 #ifndef SIOCGLIFPHYADDR
554 u_long srccmd, dstcmd;
560 force = 0; /*fool gcc*/
562 psrcaddr[0] = pdstaddr[0] = '\0';
565 s6 = socket(AF_INET6, SOCK_DGRAM, 0);
568 srccmd = SIOCGIFPSRCADDR;
569 dstcmd = SIOCGIFPDSTADDR;
572 srccmd = SIOCGIFPSRCADDR_IN6;
573 dstcmd = SIOCGIFPDSTADDR_IN6;
574 ifrp = (struct ifreq *)&in6_ifr;
578 srccmd = SIOCGIFPSRCADDR;
579 dstcmd = SIOCGIFPDSTADDR;
582 if (0 <= ioctl(s, srccmd, (caddr_t)ifrp)) {
584 if (ifrp->ifr_addr.sa_family == AF_INET6)
591 if (getnameinfo(&ifrp->ifr_addr, ifrp->ifr_addr.sa_len,
592 psrcaddr, sizeof(psrcaddr), 0, 0, flags) != 0)
595 if (0 <= ioctl(s, dstcmd, (caddr_t)ifrp)) {
596 if (getnameinfo(&ifrp->ifr_addr, ifrp->ifr_addr.sa_len,
597 pdstaddr, sizeof(pdstaddr), 0, 0, flags) != 0)
600 printf("\tphysical address %s %s --> %s\n", af, psrcaddr, pdstaddr);
602 struct if_laddrreq iflr;
604 force = 0; /*fool gcc*/
606 psrcaddr[0] = pdstaddr[0] = '\0';
608 memset(&iflr, 0, sizeof(iflr));
609 memcpy(iflr.iflr_name, ifr.ifr_name, sizeof(iflr.iflr_name));
611 if (0 <= ioctl(s, SIOCGLIFPHYADDR, (caddr_t)&iflr)) {
612 switch (iflr.addr.ss_family) {
622 if (getnameinfo((struct sockaddr *)&iflr.addr, iflr.addr.ss_len,
623 psrcaddr, sizeof(psrcaddr), 0, 0, flags) != 0)
625 if (getnameinfo((struct sockaddr *)&iflr.dstaddr,
626 iflr.dstaddr.ss_len, pdstaddr, sizeof(pdstaddr), 0, 0,
630 printf("\tphysical address %s %s --> %s\n", af, psrcaddr, pdstaddr);
637 struct sockaddr_in *sin, null_sin;
642 memset(&null_sin, 0, sizeof(null_sin));
644 sin = (struct sockaddr_in *)info.rti_info[RTAX_IFA];
645 if (!sin || sin->sin_family != AF_INET) {
648 /* warnx("%s has no AF_INET IFA address!", name); */
651 printf("\tinet %s ", inet_ntoa(sin->sin_addr));
653 if (flags & IFF_POINTOPOINT) {
654 /* note RTAX_BRD overlap with IFF_BROADCAST */
655 sin = (struct sockaddr_in *)info.rti_info[RTAX_BRD];
658 printf("--> %s ", inet_ntoa(sin->sin_addr));
661 sin = (struct sockaddr_in *)info.rti_info[RTAX_NETMASK];
664 printf("netmask 0x%x ", (u_int32_t)ntohl(sin->sin_addr.s_addr));
666 if (flags & IFF_BROADCAST) {
667 /* note RTAX_BRD overlap with IFF_POINTOPOINT */
668 sin = (struct sockaddr_in *)info.rti_info[RTAX_BRD];
669 if (sin && sin->sin_addr.s_addr != 0)
670 printf("broadcast %s", inet_ntoa(sin->sin_addr));
677 in6_status(int force)
679 struct sockaddr_in6 *sin, null_sin;
680 char hostname[NI_MAXHOST];
681 int niflags = NI_NUMERICHOST;
683 memset(&null_sin, 0, sizeof(null_sin));
684 #ifdef NI_WITHSCOPEID
685 niflags |= NI_WITHSCOPEID;
688 sin = (struct sockaddr_in6 *)info.rti_info[RTAX_IFA];
689 if (!sin || sin->sin6_family != AF_INET6) {
692 /* warnx("%s has no AF_INET6 IFA address!", name); */
696 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
698 ntohs(*(u_int16_t *)&sin->sin6_addr.s6_addr[2]);
699 sin->sin6_addr.s6_addr[2] = 0;
700 sin->sin6_addr.s6_addr[3] = 0;
703 getnameinfo((struct sockaddr *)sin, sin->sin6_len,
704 hostname, sizeof(hostname), 0, 0, niflags);
705 printf("\tinet6 %s ", hostname);
707 if (flags & IFF_POINTOPOINT) {
708 /* note RTAX_BRD overlap with IFF_BROADCAST */
709 sin = (struct sockaddr_in6 *)info.rti_info[RTAX_BRD];
711 * some of ther interfaces do not have valid destination
714 if (sin->sin6_family == AF_INET6) {
716 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
718 ntohs(*(u_int16_t *)&sin->sin6_addr.s6_addr[2]);
719 sin->sin6_addr.s6_addr[2] = 0;
720 sin->sin6_addr.s6_addr[3] = 0;
723 getnameinfo((struct sockaddr *)sin, sin->sin6_len,
724 hostname, sizeof(hostname), 0, 0, niflags);
725 printf("--> %s ", hostname);
729 sin = (struct sockaddr_in6 *)info.rti_info[RTAX_NETMASK];
732 printf(" prefixlen %d ", prefix(&sin->sin6_addr,
733 sizeof(struct in6_addr)));
741 ether_status(int dummy)
746 dummy = 0; /*fool gcc*/
748 cp = (char *)LLADDR(sdl);
749 if ((n = sdl->sdl_alen) > 0) {
750 if (sdl->sdl_type == IFT_ETHER)
753 printf ("\tlladdr ");
755 printf("%02x%c",*cp++ & 0xff, n>0? ':' : ' ');
766 errx(1, "%s: no such interface", cmd);
770 errx(1, "%s: permission denied", cmd);
778 #define SIN(x) ((struct sockaddr_in *) &(x))
779 struct sockaddr_in *sintab[] = {
780 SIN(addreq.ifra_addr), SIN(addreq.ifra_dstaddr)};
783 in_getaddr(char *s, int which)
785 struct sockaddr_in *sin = sintab[which];
789 sin->sin_len = sizeof(*sin);
790 sin->sin_family = AF_INET;
792 if (inet_aton(s, &sin->sin_addr))
794 else if ((hp = gethostbyname(s)) != NULL)
795 bcopy(hp->h_addr, (char *)&sin->sin_addr, hp->h_length);
796 else if ((np = getnetbyname(s)) != NULL)
797 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
799 errx(1, "%s: bad value", s);
803 #define SIN6(x) ((struct sockaddr_in6 *) &(x))
804 struct sockaddr_in6 *sin6tab[] = {
805 SIN6(in6_addreq.ifra_addr), SIN6(in6_addreq.ifra_dstaddr)};
808 in6_getaddr(char *s, int which)
810 struct sockaddr_in6 *sin = sin6tab[which];
812 sin->sin6_len = sizeof(*sin);
813 sin->sin6_family = AF_INET6;
815 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1)
816 errx(1, "%s: bad value", s);
820 in6_getprefix(char *plen, int which)
822 struct sockaddr_in6 *sin = sin6tab[which];
824 int len = atoi(plen);
826 if ((len < 0) || (len > 128))
827 errx(1, "%s: bad value", plen);
828 sin->sin6_len = sizeof(*sin);
829 sin->sin6_family = AF_INET6;
830 if ((len == 0) || (len == 128)) {
831 memset(&sin->sin6_addr, -1, sizeof(struct in6_addr));
834 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8)
836 *cp = (-1) << (8 - len);
841 * Print a value a la the %b format of the kernel's printf
844 printb(char *s, unsigned int v, char *bits)
849 if (bits && *bits == 8)
850 printf("%s=%o", s, v & 0xffff);
852 printf("%s=%x", s, v & 0xffff);
856 while ((i = *bits++) != 0) {
857 if ((v & (1 << (i-1))) != 0) {
861 for (; (c = *bits) > 32; bits++)
864 for (; *bits > 32; bits++)
873 prefix(void *val, int size)
875 u_char *name = (u_char *)val;
876 int byte, bit, plen = 0;
878 for (byte = 0; byte < size; byte++, plen += 8)
879 if (name[byte] != 0xff)
883 for (bit = 7; bit != 0; bit--, plen++)
884 if (!(name[byte] & (1 << bit)))
886 for (; bit != 0; bit--)
887 if (name[byte] & (1 << bit))
890 for (; byte < size; byte++)