diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-02-10 18:56:56 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-02-19 02:48:05 +0100 |
| commit | b20ab9cc63ca4605aec154cf54faa8455749f3f6 (patch) | |
| tree | 2948bf6e3ea7cd4e7b776895f1d059c15c3d914f /net/netfilter/nf_nat_ftp.c | |
| parent | 38124328fb3ea0b28451071bf3c7401e35c91020 (diff) | |
netfilter: nf_ct_helper: better logging for dropped packets
Connection tracking helpers have to drop packets under exceptional
situations. Currently, the user gets the following logging message
in case that happens:
nf_ct_%s: dropping packet ...
However, depending on the helper, there are different reasons why a
packet can be dropped.
This patch modifies the existing code to provide more specific
error message in the scope of each helper to help users to debug
the reason why the packet has been dropped, ie:
nf_ct_%s: dropping packet: reason ...
Thanks to Joe Perches for many formatting suggestions.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_nat_ftp.c')
| -rw-r--r-- | net/netfilter/nf_nat_ftp.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/netfilter/nf_nat_ftp.c b/net/netfilter/nf_nat_ftp.c index e839b97b2863..e84a578dbe35 100644 --- a/net/netfilter/nf_nat_ftp.c +++ b/net/netfilter/nf_nat_ftp.c @@ -96,8 +96,10 @@ static unsigned int nf_nat_ftp(struct sk_buff *skb, } } - if (port == 0) + if (port == 0) { + nf_ct_helper_log(skb, ct, "all ports in use"); return NF_DROP; + } buflen = nf_nat_ftp_fmt_cmd(ct, type, buffer, sizeof(buffer), &newaddr, port); @@ -113,6 +115,7 @@ static unsigned int nf_nat_ftp(struct sk_buff *skb, return NF_ACCEPT; out: + nf_ct_helper_log(skb, ct, "cannot mangle packet"); nf_ct_unexpect_related(exp); return NF_DROP; } |