Add an "fn_printzp()" routine for printing null-padded strings (strings

with a maximum length, where a string shorter than that length is padded
with NULs), as "fn_print()" won't handle the maximum length *and* the
snapshot length and "fn_printn()" won't stop on a null string.  Use it
where appropriate.

Always pass "snapend" to "fn_print()" and "fn_printn()" if they're
passed a pointer into the packet data; only pass NULL if they're being
handed a pointer into a buffer that's not part of the packet data.

Always check the return value of "fn_print()", "fn_printn()", and
"fn_printzp()" if they're passed "snapend", and do the appropriate
string termination and "packet truncated" indication if they return 1.

1 files changed, 5 insertions, 2 deletions

diff --git a/print-vrrp.c b/print-vrrp.c
index 12fbe7b3..899542da 100644
--- a/print-vrrp.c
+++ b/print-vrrp.c
@@ -25,7 +25,7 @@
 
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-vrrp.c,v 1.9 2003-11-16 09:36:41 guy Exp $";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-vrrp.c,v 1.10 2005-05-06 07:56:54 guy Exp $";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -128,7 +128,10 @@ vrrp_print(register const u_char *bp, register u_int len, int ttl)
 		if (auth_type == VRRP_AUTH_SIMPLE) { /* simple text password */
 			TCHECK(bp[7]);
 			printf(" auth \"");
-			fn_printn(bp, 8, NULL);
+			if (fn_printn(bp, 8, snapend)) {
+				printf("\"");
+				goto trunc;
+			}
 			printf("\"");
 		}
 	}