[Bug 1060] New: Garbage output

[bugzilla-daemon at netfilter.org]

https://bugzilla.netfilter.org/show_bug.cgi?id=1060

            Bug ID: 1060
           Summary: Garbage output
           Product: libnetfilter_log
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: libnetfilter_log
          Assignee: netfilter-buglog at lists.netfilter.org
          Reporter: roa at eurotux.com

libnetfilter_log produces lots of garbage to stdout, making programs that use
its functions do that too.

How to reproduce:

# iptables -I INPUT -j NFLOG --nflog-group 16
# iptables -I FORWARD -j NFLOG --nflog-group 16
# iptables -I OUTPUT -j NFLOG --nflog-group 16

# /usr/bin/fprobe-ulog 127.0.0.1:8818/127.0.0.1 -n7 -U32768 -l2
[INFO]: Starting 1.2...
[INFO]: pid: 26971
[INFO]: options: u=32768 s=5 g=30 d=60 e=300 n=7 a=0.0.0.0 M=0 b=10000 m=0
q=100 B=0 r=0 t=0:0 c= u= v=6 l=2
[INFO]: collector #1: 127.0.0.1:8818/127.0.0.1/m
first
next
next
next
next
next
next
next
next
next
first
next
next
next
first
next
next
next
first
next
next
next
^C

After a while, it's a complete log clutter and waste of resources.

The problem is present in the latest git version, but seems to have been there
for a while:

$ grep -n 'printf.*\(first\|next\)' src/*
src/libipulog_compat.c:136:        printf("first\n");
src/libipulog_compat.c:139:next_msg:    printf("next\n");

Those printfs seem to have been forgotten when debugging, I'd say.

Sure it's possible to workaround (redirecting the output somewhere in the
middle?) but the methods aren't exactly desirable so I'd recommend fixing this.

Best regards.

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