freebsd-dev/sbin/ifconfig/af_inet6.c
Sam Leffler cb8c905ae9 use getifaddrs from libc instead of private code
Reviewed by:	bms
MFC after:	1 month
2007-02-24 23:55:46 +00:00

539 lines
14 KiB
C

/*
* Copyright (c) 1983, 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 rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ifaddrs.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <net/if_var.h> /* for struct ifaddr */
#include <netinet/in_var.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */
#include "ifconfig.h"
static struct in6_ifreq in6_ridreq;
static struct in6_aliasreq in6_addreq =
{ { 0 },
{ 0 },
{ 0 },
{ 0 },
0,
{ 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } };
static int ip6lifetime;
static void in6_fillscopeid(struct sockaddr_in6 *sin6);
static int prefix(void *, int);
static char *sec2str(time_t);
static int explicit_prefix = 0;
static char addr_buf[MAXHOSTNAMELEN *2 + 1]; /*for getnameinfo()*/
static void
setifprefixlen(const char *addr, int dummy __unused, int s,
const struct afswtch *afp)
{
if (afp->af_getprefix != NULL)
afp->af_getprefix(addr, MASK);
explicit_prefix = 1;
}
static void
setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused,
const struct afswtch *afp)
{
if (afp->af_af != AF_INET6)
err(1, "address flags can be set only for inet6 addresses");
if (flag < 0)
in6_addreq.ifra_flags &= ~(-flag);
else
in6_addreq.ifra_flags |= flag;
}
static void
setip6lifetime(const char *cmd, const char *val, int s,
const struct afswtch *afp)
{
time_t newval, t;
char *ep;
t = time(NULL);
newval = (time_t)strtoul(val, &ep, 0);
if (val == ep)
errx(1, "invalid %s", cmd);
if (afp->af_af != AF_INET6)
errx(1, "%s not allowed for the AF", cmd);
if (strcmp(cmd, "vltime") == 0) {
in6_addreq.ifra_lifetime.ia6t_expire = t + newval;
in6_addreq.ifra_lifetime.ia6t_vltime = newval;
} else if (strcmp(cmd, "pltime") == 0) {
in6_addreq.ifra_lifetime.ia6t_preferred = t + newval;
in6_addreq.ifra_lifetime.ia6t_pltime = newval;
}
}
static void
setip6pltime(const char *seconds, int dummy __unused, int s,
const struct afswtch *afp)
{
setip6lifetime("pltime", seconds, s, afp);
}
static void
setip6vltime(const char *seconds, int dummy __unused, int s,
const struct afswtch *afp)
{
setip6lifetime("vltime", seconds, s, afp);
}
static void
setip6eui64(const char *cmd, int dummy __unused, int s,
const struct afswtch *afp)
{
struct ifaddrs *ifap, *ifa;
const struct sockaddr_in6 *sin6 = NULL;
const struct in6_addr *lladdr = NULL;
struct in6_addr *in6;
if (afp->af_af != AF_INET6)
errx(EXIT_FAILURE, "%s not allowed for the AF", cmd);
in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr;
if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0)
errx(EXIT_FAILURE, "interface index is already filled");
if (getifaddrs(&ifap) != 0)
err(EXIT_FAILURE, "getifaddrs");
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family == AF_INET6 &&
strcmp(ifa->ifa_name, name) == 0) {
sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr;
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
lladdr = &sin6->sin6_addr;
break;
}
}
}
if (!lladdr)
errx(EXIT_FAILURE, "could not determine link local address");
memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8);
freeifaddrs(ifap);
}
static void
in6_fillscopeid(struct sockaddr_in6 *sin6)
{
#if defined(__KAME__) && defined(KAME_SCOPEID)
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_scope_id =
ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0;
}
#endif
}
static void
in6_status(int s __unused, const struct ifaddrs *ifa)
{
struct sockaddr_in6 *sin, null_sin;
struct in6_ifreq ifr6;
int s6;
u_int32_t flags6;
struct in6_addrlifetime lifetime;
time_t t = time(NULL);
int error;
u_int32_t scopeid;
memset(&null_sin, 0, sizeof(null_sin));
sin = (struct sockaddr_in6 *)ifa->ifa_addr;
if (sin == NULL)
return;
strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name));
if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
warn("socket(AF_INET6,SOCK_DGRAM)");
return;
}
ifr6.ifr_addr = *sin;
if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
warn("ioctl(SIOCGIFAFLAG_IN6)");
close(s6);
return;
}
flags6 = ifr6.ifr_ifru.ifru_flags6;
memset(&lifetime, 0, sizeof(lifetime));
ifr6.ifr_addr = *sin;
if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) {
warn("ioctl(SIOCGIFALIFETIME_IN6)");
close(s6);
return;
}
lifetime = ifr6.ifr_ifru.ifru_lifetime;
close(s6);
/* XXX: embedded link local addr check */
if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) &&
*(u_short *)&sin->sin6_addr.s6_addr[2] != 0) {
u_short index;
index = *(u_short *)&sin->sin6_addr.s6_addr[2];
*(u_short *)&sin->sin6_addr.s6_addr[2] = 0;
if (sin->sin6_scope_id == 0)
sin->sin6_scope_id = ntohs(index);
}
scopeid = sin->sin6_scope_id;
error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf,
sizeof(addr_buf), NULL, 0, NI_NUMERICHOST);
if (error != 0)
inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
sizeof(addr_buf));
printf("\tinet6 %s ", addr_buf);
if (ifa->ifa_flags & IFF_POINTOPOINT) {
sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
/*
* some of the interfaces do not have valid destination
* address.
*/
if (sin != NULL && sin->sin6_family == AF_INET6) {
int error;
/* XXX: embedded link local addr check */
if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) &&
*(u_short *)&sin->sin6_addr.s6_addr[2] != 0) {
u_short index;
index = *(u_short *)&sin->sin6_addr.s6_addr[2];
*(u_short *)&sin->sin6_addr.s6_addr[2] = 0;
if (sin->sin6_scope_id == 0)
sin->sin6_scope_id = ntohs(index);
}
error = getnameinfo((struct sockaddr *)sin,
sin->sin6_len, addr_buf,
sizeof(addr_buf), NULL, 0,
NI_NUMERICHOST);
if (error != 0)
inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
sizeof(addr_buf));
printf("--> %s ", addr_buf);
}
}
sin = (struct sockaddr_in6 *)ifa->ifa_netmask;
if (sin == NULL)
sin = &null_sin;
printf("prefixlen %d ", prefix(&sin->sin6_addr,
sizeof(struct in6_addr)));
if ((flags6 & IN6_IFF_ANYCAST) != 0)
printf("anycast ");
if ((flags6 & IN6_IFF_TENTATIVE) != 0)
printf("tentative ");
if ((flags6 & IN6_IFF_DUPLICATED) != 0)
printf("duplicated ");
if ((flags6 & IN6_IFF_DETACHED) != 0)
printf("detached ");
if ((flags6 & IN6_IFF_DEPRECATED) != 0)
printf("deprecated ");
if ((flags6 & IN6_IFF_AUTOCONF) != 0)
printf("autoconf ");
if ((flags6 & IN6_IFF_TEMPORARY) != 0)
printf("temporary ");
if (scopeid)
printf("scopeid 0x%x ", scopeid);
if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) {
printf("pltime ");
if (lifetime.ia6t_preferred) {
printf("%s ", lifetime.ia6t_preferred < t
? "0" : sec2str(lifetime.ia6t_preferred - t));
} else
printf("infty ");
printf("vltime ");
if (lifetime.ia6t_expire) {
printf("%s ", lifetime.ia6t_expire < t
? "0" : sec2str(lifetime.ia6t_expire - t));
} else
printf("infty ");
}
putchar('\n');
}
#define SIN6(x) ((struct sockaddr_in6 *) &(x))
static struct sockaddr_in6 *sin6tab[] = {
SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr),
SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr)
};
static void
in6_getprefix(const char *plen, int which)
{
struct sockaddr_in6 *sin = sin6tab[which];
u_char *cp;
int len = atoi(plen);
if ((len < 0) || (len > 128))
errx(1, "%s: bad value", plen);
sin->sin6_len = sizeof(*sin);
if (which != MASK)
sin->sin6_family = AF_INET6;
if ((len == 0) || (len == 128)) {
memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr));
return;
}
memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr));
for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8)
*cp++ = 0xff;
*cp = 0xff << (8 - len);
}
static void
in6_getaddr(const char *s, int which)
{
struct sockaddr_in6 *sin = sin6tab[which];
struct addrinfo hints, *res;
int error = -1;
newaddr &= 1;
sin->sin6_len = sizeof(*sin);
if (which != MASK)
sin->sin6_family = AF_INET6;
if (which == ADDR) {
char *p = NULL;
if((p = strrchr(s, '/')) != NULL) {
*p = '\0';
in6_getprefix(p + 1, MASK);
explicit_prefix = 1;
}
}
if (sin->sin6_family == AF_INET6) {
bzero(&hints, sizeof(struct addrinfo));
hints.ai_family = AF_INET6;
error = getaddrinfo(s, NULL, &hints, &res);
}
if (error != 0) {
if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1)
errx(1, "%s: bad value", s);
} else
bcopy(res->ai_addr, sin, res->ai_addrlen);
}
static int
prefix(void *val, int size)
{
u_char *name = (u_char *)val;
int byte, bit, plen = 0;
for (byte = 0; byte < size; byte++, plen += 8)
if (name[byte] != 0xff)
break;
if (byte == size)
return (plen);
for (bit = 7; bit != 0; bit--, plen++)
if (!(name[byte] & (1 << bit)))
break;
for (; bit != 0; bit--)
if (name[byte] & (1 << bit))
return(0);
byte++;
for (; byte < size; byte++)
if (name[byte])
return(0);
return (plen);
}
static char *
sec2str(time_t total)
{
static char result[256];
int days, hours, mins, secs;
int first = 1;
char *p = result;
if (0) {
days = total / 3600 / 24;
hours = (total / 3600) % 24;
mins = (total / 60) % 60;
secs = total % 60;
if (days) {
first = 0;
p += sprintf(p, "%dd", days);
}
if (!first || hours) {
first = 0;
p += sprintf(p, "%dh", hours);
}
if (!first || mins) {
first = 0;
p += sprintf(p, "%dm", mins);
}
sprintf(p, "%ds", secs);
} else
sprintf(result, "%lu", (unsigned long)total);
return(result);
}
static void
in6_postproc(int s, const struct afswtch *afp)
{
if (explicit_prefix == 0) {
/* Aggregatable address architecture defines all prefixes
are 64. So, it is convenient to set prefixlen to 64 if
it is not specified. */
setifprefixlen("64", 0, s, afp);
/* in6_getprefix("64", MASK) if MASK is available here... */
}
}
static void
in6_status_tunnel(int s)
{
char src[NI_MAXHOST];
char dst[NI_MAXHOST];
struct in6_ifreq in6_ifr;
const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr;
memset(&in6_ifr, 0, sizeof(in6_ifr));
strncpy(in6_ifr.ifr_name, name, IFNAMSIZ);
if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0)
return;
if (sa->sa_family != AF_INET6)
return;
in6_fillscopeid(&in6_ifr.ifr_addr);
if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0,
NI_NUMERICHOST) != 0)
src[0] = '\0';
if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0)
return;
if (sa->sa_family != AF_INET6)
return;
in6_fillscopeid(&in6_ifr.ifr_addr);
if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0,
NI_NUMERICHOST) != 0)
dst[0] = '\0';
printf("\ttunnel inet6 %s --> %s\n", src, dst);
}
static void
in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
{
struct in6_aliasreq in6_addreq;
memset(&in6_addreq, 0, sizeof(in6_addreq));
strncpy(in6_addreq.ifra_name, name, IFNAMSIZ);
memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr,
dstres->ai_addr->sa_len);
if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0)
warn("SIOCSIFPHYADDR_IN6");
}
static struct cmd inet6_cmds[] = {
DEF_CMD_ARG("prefixlen", setifprefixlen),
DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags),
DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags),
DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags),
DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags),
DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags),
DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags),
DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags),
DEF_CMD_ARG("pltime", setip6pltime),
DEF_CMD_ARG("vltime", setip6vltime),
DEF_CMD("eui64", 0, setip6eui64),
};
static struct afswtch af_inet6 = {
.af_name = "inet6",
.af_af = AF_INET6,
.af_status = in6_status,
.af_getaddr = in6_getaddr,
.af_getprefix = in6_getprefix,
.af_postproc = in6_postproc,
.af_status_tunnel = in6_status_tunnel,
.af_settunnel = in6_set_tunnel,
.af_difaddr = SIOCDIFADDR_IN6,
.af_aifaddr = SIOCAIFADDR_IN6,
.af_ridreq = &in6_addreq,
.af_addreq = &in6_addreq,
};
static void
in6_Lopt_cb(const char *optarg __unused)
{
ip6lifetime++; /* print IPv6 address lifetime */
}
static struct option in6_Lopt = { "L", "[-L]", in6_Lopt_cb };
static __constructor void
inet6_ctor(void)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
int i;
for (i = 0; i < N(inet6_cmds); i++)
cmd_register(&inet6_cmds[i]);
af_register(&af_inet6);
opt_register(&in6_Lopt);
#undef N
}