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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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
*/
/*
* Copyright (c) 1991, 1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <unistd.h>
#include <malloc.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netdb.h>
#include <string.h>
#include <signal.h>
#include <setjmp.h>
/*
* Note: If making changes to this file, check also the file
* cmd/cmd-inet/usr.sbin/snoop/snoop_ipaddr.c
* as it has the same functions there.
*/
static jmp_buf nisjmp;
#define MAXHASH 1024 /* must be a power of 2 */
struct hostdata {
struct hostdata *h_next;
char *h_hostname;
int h_pktsout;
int h_pktsin;
};
struct hostdata4 {
struct hostdata4 *h4_next;
char *h4_hostname;
int h4_pktsout;
int h4_pktsin;
struct in_addr h4_addr;
};
struct hostdata6 {
struct hostdata6 *h6_next;
char *h6_hostname;
int h6_pktsout;
int h6_pktsin;
struct in6_addr h6_addr;
};
static struct hostdata *addhost(int, void *, char *);
static struct hostdata4 *h_table4[MAXHASH];
static struct hostdata6 *h_table6[MAXHASH];
#define iphash(e) ((e) & (MAXHASH-1))
/* ARGSUSED */
static void
wakeup(int n)
{
longjmp(nisjmp, 1);
}
extern char *inet_ntoa();
static struct hostdata *
iplookup(ipaddr)
struct in_addr *ipaddr;
{
register struct hostdata4 *h;
struct hostent *hp = NULL;
struct netent *np;
int error_num;
for (h = h_table4[iphash(ipaddr->s_addr)]; h; h = h->h4_next) {
if (h->h4_addr.s_addr == ipaddr->s_addr)
return ((struct hostdata *)h);
}
/* not found. Put it in */
if (ipaddr->s_addr == htonl(INADDR_BROADCAST))
return (addhost(AF_INET, ipaddr, "BROADCAST"));
if (ipaddr->s_addr == htonl(INADDR_ANY))
return (addhost(AF_INET, ipaddr, "OLD-BROADCAST"));
/*
* Set an alarm here so we don't get held up by
* an unresponsive name server.
* Give it 3 sec to do its work.
*/
if (setjmp(nisjmp) == 0) {
(void) signal(SIGALRM, wakeup);
(void) alarm(3);
hp = getipnodebyaddr((char *)ipaddr, sizeof (struct in_addr),
AF_INET, &error_num);
if (hp == NULL && inet_lnaof(*ipaddr) == 0) {
np = getnetbyaddr(inet_netof(*ipaddr), AF_INET);
if (np)
return (addhost(AF_INET, ipaddr, np->n_name));
}
(void) alarm(0);
} else {
hp = NULL;
}
return (addhost(AF_INET, ipaddr, hp ? hp->h_name : inet_ntoa(*ipaddr)));
}
static struct hostdata *
ip6lookup(ip6addr)
struct in6_addr *ip6addr;
{
struct hostdata6 *h;
struct hostent *hp = NULL;
int error_num;
char addrstr[INET6_ADDRSTRLEN];
char *addname;
struct hostdata *retval;
for (h = h_table6[iphash(((uint32_t *)ip6addr)[3])]; h;
h = h->h6_next) {
if (IN6_ARE_ADDR_EQUAL(&h->h6_addr, ip6addr))
return ((struct hostdata *)h);
}
/* not in the hash table, put it in */
if (IN6_IS_ADDR_UNSPECIFIED(ip6addr))
return (addhost(AF_INET6, ip6addr, "UNSPECIFIED"));
/*
* Set an alarm here so we don't get held up by
* an unresponsive name server.
* Give it 3 sec to do its work.
*/
if (setjmp(nisjmp) == 0) {
(void) signal(SIGALRM, wakeup);
(void) alarm(3);
hp = getipnodebyaddr(ip6addr, sizeof (struct in6_addr),
AF_INET6, &error_num);
(void) alarm(0);
} else {
hp = NULL;
}
if (hp != NULL)
addname = hp->h_name;
else {
(void) inet_ntop(AF_INET6, ip6addr, addrstr, INET6_ADDRSTRLEN);
addname = addrstr;
}
retval = addhost(AF_INET6, ip6addr, addname);
freehostent(hp);
return (retval);
}
static struct hostdata *
addhost(family, ipaddr, name)
int family;
void *ipaddr;
char *name;
{
register struct hostdata **hp, *n;
int hashval;
switch (family) {
case AF_INET:
n = (struct hostdata *)malloc(sizeof (struct hostdata4));
if (n == NULL)
goto alloc_failed;
(void) memset(n, 0, sizeof (struct hostdata4));
n->h_hostname = strdup(name);
if (n->h_hostname == NULL)
goto alloc_failed;
((struct hostdata4 *)n)->h4_addr = *(struct in_addr *)ipaddr;
hashval = ((struct in_addr *)ipaddr)->s_addr;
hp = (struct hostdata **)&h_table4[iphash(hashval)];
break;
case AF_INET6:
n = (struct hostdata *)malloc(sizeof (struct hostdata6));
if (n == NULL)
goto alloc_failed;
(void) memset(n, 0, sizeof (struct hostdata6));
n->h_hostname = strdup(name);
if (n->h_hostname == NULL)
goto alloc_failed;
(void) memcpy(&((struct hostdata6 *)n)->h6_addr, ipaddr,
sizeof (struct in6_addr));
hashval = ((int *)ipaddr)[3];
hp = (struct hostdata **)&h_table6[iphash(hashval)];
break;
default:
(void) fprintf(stderr,
"nfslog: addhost ERROR: Unknown address family: %d",
family);
return (NULL);
}
n->h_next = *hp;
*hp = n;
return (n);
alloc_failed:
(void) fprintf(stderr, "addhost: no mem\n");
if (n != NULL)
free(n);
return (NULL);
}
char *
addrtoname(void *sockp)
{
struct hostdata *hostp;
int family = ((struct sockaddr_in *)sockp)->sin_family;
switch (family) {
case AF_INET:
hostp = iplookup(&((struct sockaddr_in *)sockp)->sin_addr);
break;
case AF_INET6:
hostp = ip6lookup(&((struct sockaddr_in6 *)sockp)->sin6_addr);
break;
default:
(void) fprintf(stderr, "nfslog: ERROR: unknown address " \
"family: %d\n", family);
hostp = NULL;
}
return ((hostp != NULL) ? hostp->h_hostname : NULL);
}
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