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Code Issues Releases Activity

Submitted by: Sebastian Strollo <seb@erix.eriksson.se>

Browse Source 
Fixes to ypbind:

- Correctly report the fact that we've bound to a new server when
logging the 'server OK' message.

- Report 'server not responding' just once instead of every
5 seconds while searching for a new server. (Prevents overstuffing
the syslog.)

- Apply patch from Sebstian Strollo to implement '-s' (secure) flag.
ypbind will reject connections from servers that do not originate
from a reserved TCP port.

- Apply patch from Sebastian Strollo to detect when a YP server has
crashed and come back up on a different port number.
This commit is contained in:
Bill Paul 1995-02-26 04:42:48 +00:00
parent 0fe414febc
commit 6a4f61a2ab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=6732
1 changed files with 25 additions and 13 deletions
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38
usr.sbin/ypbind/ypbind.c
View File

@ -28,7 +28,7 @@
*/
#ifndef LINT
static char rcsid[] = "$Id: ypbind.c,v 1.2 1994/09/23 10:25:38 davidg Exp $";
static char rcsid[] = "$Id: ypbind.c,v 1.3 1995/02/16 01:21:44 wpaul Exp $";
#endif
#include <sys/param.h>
@ -49,6 +49,7 @@ static char rcsid[] = "$Id: ypbind.c,v 1.2 1994/09/23 10:25:38 davidg Exp $";
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
@ -98,6 +99,8 @@ int check;
#define YPSET_ALL 2
int ypsetmode = YPSET_NO;
int ypsecuremode = 0;
int rpcsock;
struct rmtcallargs rmtca;
struct rmtcallres rmtcr;
@ -304,7 +307,9 @@ char **argv;
if( strcmp("-ypset", argv[i]) == 0)
ypsetmode = YPSET_ALL;
else if (strcmp("-ypsetme", argv[i]) == 0)
ypsetmode = YPSET_LOCAL;
ypsetmode = YPSET_LOCAL;
else if (strcmp("-s", argv[i]) == 0)
ypsecuremode++;
}
/* blow away everything in BINDINGDIR */
@ -444,17 +449,16 @@ checkwork()
ypdb->dom_server_addr, ypdb->dom_alive);
ypdb->dom_check_t = t + ypdb->dom_interval;
ypdb->dom_answered = 0;
if (ypdb->dom_vers == 0)
syslog (LOG_NOTICE,
"NIS server [%s] for domain %s not responding.",
inet_ntoa(ypdb->dom_server_addr.sin_addr),
ypdb->dom_domain);
} else
if (!ypdb->dom_answered && ypdb->dom_alive &&
ypdb->dom_check_t < (t + FAIL_THRESHOLD)) {
ypdb->dom_check_t = ypdb->dom_alive =
ypdb->dom_check_t = ypdb->dom_alive =
ypdb->dom_vers = 0;
ypdb->dom_interval = 5;
syslog (LOG_NOTICE,
"NIS server [%s] for domain %s not responding.",
inet_ntoa(ypdb->dom_server_addr.sin_addr),
ypdb->dom_domain);
}
}
}
@ -570,7 +574,6 @@ int direct;
}
} else
continue;
in = ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr;
bsin.sin_addr = in;
if( sendto(rpcsock, buf, outlen, 0,
@ -650,11 +653,20 @@ int force;
char path[MAXPATHLEN];
int fd;
/*printf("returned from %s about %s\n", inet_ntoa(raddrp->sin_addr), dom);*/
/*printf("returned from %s/%d about %s\n", inet_ntoa(raddrp->sin_addr),
ntohs(raddrp->sin_port), dom);*/
if(dom==NULL)
return;
/* if in securemode, check originating port number */
if (ypsecuremode && (ntohs(raddrp->sin_port) >= IPPORT_RESERVED)) {
syslog(LOG_WARNING, "Rejected NIS server on [%s/%d] for domain %s.",
inet_ntoa(raddrp->sin_addr), ntohs(raddrp->sin_port),
dom);
return;
}
for(ypdb=ypbindlist; ypdb; ypdb=ypdb->dom_pnext)
if( strcmp(ypdb->dom_domain, dom) == 0)
break;
@ -672,7 +684,8 @@ int force;
/* soft update, alive, less than FAIL_THRESHOLD seconds old */
if(ypdb->dom_alive==1 && (force==0 || ypdb->dom_answered == 0)
&& (ypdb->dom_check_t - FAIL_THRESHOLD) > time(NULL)) {
&& (ypdb->dom_check_t - FAIL_THRESHOLD) > time(NULL)
&& (ypdb->dom_server_addr.sin_port == raddrp->sin_port)) {
ypdb->dom_answered = 1;
ypdb->dom_interval = 60;
return;
@ -683,8 +696,7 @@ int force;
*/
if (ypdb->dom_vers == 0)
syslog(LOG_NOTICE, "NIS server [%s] for domain %s OK.",
inet_ntoa(ypdb->dom_server_addr.sin_addr),
ypdb->dom_domain);
inet_ntoa(raddrp->sin_addr), ypdb->dom_domain);
bcopy((char *)raddrp, (char *)&ypdb->dom_server_addr,
sizeof ypdb->dom_server_addr);