Date: Sat, 16 Mar 1996 01:22:24 +0900 (JST)
From: greg@greg.rim.or.jp
To: FreeBSD-gnats-submit@freebsd.org
Subject: misc/1079: Can not work about get{host|net]byaddr on NIS.
Message-ID: <199603151622.BAA26562@apollon.greg.rim.or.jp>
Resent-Message-ID: <199603151640.IAA09982@freefall.freebsd.org>
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>Number: 1079
>Category: misc
>Synopsis: Can not work about get{host|net]byaddr on NIS.
>Confidential: yes
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Mar 15 08:40:02 PST 1996
>Last-Modified:
>Originator: Kensaku Masuda
>Organization:
Private domain
>Release: FreeBSD 2.2-960303-SNAP i386
>Environment:
My /etc/host.conf is
# bind
# If that doesn't work, then try the /etc/hosts file
hosts
# If you have YP/NIS configured, uncomment the next line
nis
>Description:
I have two problems. and one of them is fixed, But left is not fixed.
At first, If I selected NIS about host/net resolving, can not find
symbol name from IP address.
Ex)
# netstat -r
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
127.0.0.1 127.0.0.1 UH 0 0 lo0
123.456.789/24 link#2 UC 0 0
MyName 0:0:1:6:39:68 UHLW 11 114467 ep0 278
123.456.789.1 0:20:af:26:a0:87 UHLW 8 95529 lo0
123.456.789.255 link#2 UHLW 1 527
At last, "exit" function in Standard C library has one problem.
If some program is using STREAM functions. it will catch a signal at calling
"exit" ( BUS ERROR ). But all program is not recving a signal. May be, only
using "get{net/host]byaddr".
>How-To-Repeat:
1st problem : Use NIS and call get{host/net]byaddr.
2nd problem : run " netstat "
>Fix:
This patch is fixed 1st problem.
diff -ruN net.original/gethostbynis.c net/gethostbynis.c
--- net.original/gethostbynis.c Sat Mar 16 00:30:59 1996
+++ net/gethostbynis.c Sat Mar 16 00:26:23 1996
@@ -111,5 +111,10 @@
_gethostbynisaddr(name)
char *name;
{
- return _gethostbynis(name, "hosts.byaddr");
+ struct in_addr in;
+ /*
+ * Fast Hack
+ */
+ in.s_addr = *((long *)name);
+ return _gethostbynis(inet_ntoa(in), "hosts.byaddr");
}
diff -ruN net.original/getnetbynis.c net/getnetbynis.c
--- net.original/getnetbynis.c Sat Mar 16 00:30:56 1996
+++ net/getnetbynis.c Sat Mar 16 00:28:18 1996
@@ -122,8 +122,20 @@
if (type != AF_INET)
return (NULL);
- in.s_addr = addr;
+ /*
+ * The input is host byte oder, But inet_ntoa request network byte oder
+ */
+ in.s_addr = htonl(addr);
str = inet_ntoa(in);
+ /*
+ * Must checking. if inet_ntoa return NULL string, Will core dumped
+ */
+ if(str == NULL) {
+ return NULL;
+ }
+ if(strlen(str) < 2) {
+ return NULL;
+ }
cp = str + strlen(str) - 2;
while(!strcmp(cp, ".0")) {
*cp = '\0';
>Audit-Trail:
>Unformatted:
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