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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2010-06-17 11:55:59 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2010-06-17 11:55:59 +0200 |
| commit | 85f94171a71880c744f265268f33ad58819caa74 (patch) | |
| tree | 318cadfbd35a5f18b88a64f81b6e30b0e64cbd0c /src/conntrack.c | |
| parent | 2e06d62d341fdf936dbc1fa944d5e03f761aaf0e (diff) | |
| download | conntrack-tools-85f94171a71880c744f265268f33ad58819caa74.tar.gz conntrack-tools-85f94171a71880c744f265268f33ad58819caa74.zip | |
conntrack: `-L --src-nat --dst-nat' filter using AND, not OR logic
The patch that I committed in 2e06d62d341fdf936dbc1fa944d5e03f761aaf0e
was incomplete. With it, `-L --src-nat --dst-nat' shows source-natted
OR destination-natted flows. This patch changes the behaviour to
show source-natted AND destination-natted flows.
This is the consistent behaviour that we expect from conntrack
(this is how it works for other options indeed).
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/conntrack.c')
| -rw-r--r-- | src/conntrack.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/src/conntrack.c b/src/conntrack.c index 706fe50..b8806bd 100644 --- a/src/conntrack.c +++ b/src/conntrack.c @@ -634,15 +634,29 @@ filter_nat(const struct nf_conntrack *obj, const struct nf_conntrack *ct) { uint32_t ip; - if (options & CT_OPT_SRC_NAT) { + if ((options & CT_OPT_SRC_NAT) && (options & CT_OPT_DST_NAT)) { + if (nfct_attr_is_set(obj, ATTR_SNAT_IPV4) && + nfct_attr_is_set(obj, ATTR_DNAT_IPV4)) { + uint32_t ip2; + + ip = nfct_get_attr_u32(obj, ATTR_SNAT_IPV4); + ip2 = nfct_get_attr_u32(obj, ATTR_DNAT_IPV4); + if (ip == nfct_get_attr_u32(ct, ATTR_REPL_IPV4_DST) && + ip2 == nfct_get_attr_u32(ct, ATTR_REPL_IPV4_SRC)) { + return 0; + } + } else if (nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT) && + nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT)) { + return 0; + } + } else if (options & CT_OPT_SRC_NAT) { if (nfct_attr_is_set(obj, ATTR_SNAT_IPV4)) { ip = nfct_get_attr_u32(obj, ATTR_SNAT_IPV4); if (ip == nfct_get_attr_u32(ct, ATTR_REPL_IPV4_DST)) return 0; } else if (nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT)) return 0; - } - if (options & CT_OPT_DST_NAT) { + } else if (options & CT_OPT_DST_NAT) { if (nfct_attr_is_set(obj, ATTR_DNAT_IPV4)) { ip = nfct_get_attr_u32(obj, ATTR_DNAT_IPV4); if (ip == nfct_get_attr_u32(ct, ATTR_REPL_IPV4_SRC)) |