Hi,
I had a problem with nfdump statistics. When I tried to print out some
information using a command line like:
$ nfdump-r <file>-o "fmt: %mpls10"
The program was printing %mpls1 field, with a zero added at the end.
Something like:
MPLS lbl 1
21576-0-00
16978-0-00
17477-0-00
When it should be something like:
MPLS lbl 10
21576-0-0
16978-0-0
17477-0-0
The problem resides on the comparison between fields length and
arguments length.
For example, "%mpls1" has length 6, but "%mpls10" has length 7.
If you run strncmp ("%mpls1", "%mpls10", 6), it WILL return true.
The following patch solves the problem.
--- nfdump-1.6.6/bin/nf_common.c 2012-02-19 08:42:43.000000000 -0200
+++ nfdump-1.6.6-fix/bin/nf_common.c 2012-03-28 11:41:56.028180232 -0300
@@ -1387,4 +1387,9 @@
if ( remaining >= len && !isalpha((int)c[len]) ) {
// separator found a expected position
+ /* XXX: If mpls10 is given, an error occurs.
Handling this specific error */
+ if (c[len] == '0' && c[len-1] == '1') {
+ i++; // skip mpls1 when mpls10 is given
+ continue;
+ }
char p = c[len]; // save separator;
c[len] = '\0';
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