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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* selfcheck.c
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <errno.h>
#include <syslog.h>
#include <strings.h>
#include <malloc.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/sockio.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netdb.h>
#include <net/if.h>
int
self_check(char *hostname)
{
int s, res = 0;
struct sioc_addrreq areq;
struct hostent *hostinfo;
int family;
int flags;
int error_num;
char **hostptr;
struct sockaddr_in6 ipv6addr;
family = AF_INET6;
/*
* We cannot specify AI_DEFAULT since it includes AI_ADDRCONFIG.
* Localhost name resolution will fail if no IP interfaces other than
* loopback are plumbed and AI_ADDRCONFIG is specified, and this
* causes localhost mounts to fail.
*/
flags = AI_V4MAPPED;
if ((s = socket(family, SOCK_DGRAM, 0)) < 0) {
syslog(LOG_ERR, "self_check: socket: %m");
return (0);
}
if ((hostinfo = getipnodebyname(hostname, family, flags,
&error_num)) == NULL) {
if (error_num == TRY_AGAIN)
syslog(LOG_DEBUG,
"self_check: unknown host: %s (try again later)\n",
hostname);
else
syslog(LOG_DEBUG,
"self_check: unknown host: %s\n", hostname);
(void) close(s);
return (0);
}
for (hostptr = hostinfo->h_addr_list; *hostptr; hostptr++) {
bzero(&ipv6addr, sizeof (ipv6addr));
ipv6addr.sin6_family = AF_INET6;
ipv6addr.sin6_addr = *((struct in6_addr *)(*hostptr));
memcpy(&areq.sa_addr, (void *)&ipv6addr, sizeof (ipv6addr));
areq.sa_res = -1;
(void) ioctl(s, SIOCTMYADDR, (caddr_t)&areq);
if (areq.sa_res == 1) {
res = 1;
break;
}
}
freehostent(hostinfo);
(void) close(s);
return (res);
}
#define MAXIFS 32
/*
* create an ifconf structure that represents all the interfaces
* configured for this host. Two buffers are allcated here:
* lifc - the ifconf structure returned
* lifc->lifc_buf - the list of ifreq structures
* Both of the buffers must be freed by the calling routine.
* A NULL pointer is returned upon failure. In this case any
* data that was allocated before the failure has already been
* freed.
*/
struct lifconf *
getmyaddrs(void)
{
int sock;
struct lifnum lifn;
int numifs;
char *buf;
struct lifconf *lifc;
if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
syslog(LOG_ERR, "statd:getmyaddrs socket: %m");
return ((struct lifconf *)NULL);
}
lifn.lifn_family = AF_UNSPEC;
lifn.lifn_flags = 0;
if (ioctl(sock, SIOCGLIFNUM, (char *)&lifn) < 0) {
syslog(LOG_ERR,
"statd:getmyaddrs, get number of interfaces, error: %m");
numifs = MAXIFS;
}
numifs = lifn.lifn_count;
lifc = (struct lifconf *)malloc(sizeof (struct lifconf));
if (lifc == NULL) {
syslog(LOG_ERR,
"statd:getmyaddrs, malloc for lifconf failed: %m");
(void) close(sock);
return ((struct lifconf *)NULL);
}
buf = (char *)malloc(numifs * sizeof (struct lifreq));
if (buf == NULL) {
syslog(LOG_ERR,
"statd:getmyaddrs, malloc for lifreq failed: %m");
(void) close(sock);
free(lifc);
return ((struct lifconf *)NULL);
}
lifc->lifc_family = AF_UNSPEC;
lifc->lifc_flags = 0;
lifc->lifc_buf = buf;
lifc->lifc_len = numifs * sizeof (struct lifreq);
if (ioctl(sock, SIOCGLIFCONF, (char *)lifc) < 0) {
syslog(LOG_ERR, "statd:getmyaddrs, SIOCGLIFCONF, error: %m");
(void) close(sock);
free(buf);
free(lifc);
return ((struct lifconf *)NULL);
}
(void) close(sock);
return (lifc);
}
int
Is_ipv6present(void)
{
int sock;
struct lifnum lifn;
sock = socket(AF_INET6, SOCK_DGRAM, 0);
if (sock < 0)
return (0);
lifn.lifn_family = AF_INET6;
lifn.lifn_flags = 0;
if (ioctl(sock, SIOCGLIFNUM, (char *)&lifn) < 0) {
close(sock);
return (0);
}
close(sock);
if (lifn.lifn_count == 0)
return (0);
return (1);
}
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