* [PATCHv4] extensions: libxt_multiport: Add translation to nft
@ 2016-06-02 17:29 Laura Garcia Liebana
2016-06-06 11:27 ` Pablo Neira Ayuso
0 siblings, 1 reply; 2+ messages in thread
From: Laura Garcia Liebana @ 2016-06-02 17:29 UTC (permalink / raw)
To: netfilter-devel
Add translation for multiport to nftables, which it's supported natively.
Examples:
$ sudo iptables-translate -t filter -A INPUT -p tcp -m multiport --dports 80,81 -j ACCEPT
nft add rule ip filter INPUT ip protocol tcp tcp dport { 80,81} counter accept
$ sudo iptables-translate -t filter -A INPUT -p tcp -m multiport --dports 80:88 -j ACCEPT
nft add rule ip filter INPUT ip protocol tcp tcp dport 80-88 counter accept
$ sudo iptables-translate -t filter -A INPUT -p tcp -m multiport ! --dports 80:88 -j ACCEPT
nft add rule ip filter INPUT ip protocol tcp tcp dport != 80-88 counter accept
Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
---
Changes in v4:
- Support != {} as already given
extensions/libxt_multiport.c | 115 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 115 insertions(+)
diff --git a/extensions/libxt_multiport.c b/extensions/libxt_multiport.c
index 03af5a9..9b27260 100644
--- a/extensions/libxt_multiport.c
+++ b/extensions/libxt_multiport.c
@@ -468,6 +468,117 @@ static void multiport_save6_v1(const void *ip_void,
__multiport_save_v1(match, ip->proto);
}
+static int __multiport_xlate(const void *ip, const struct xt_entry_match *match,
+ struct xt_xlate *xl, int numeric)
+{
+ const struct xt_multiport *multiinfo
+ = (const struct xt_multiport *)match->data;
+ unsigned int i;
+
+ switch (multiinfo->flags) {
+ case XT_MULTIPORT_SOURCE:
+ xt_xlate_add(xl, "sport ");
+ break;
+ case XT_MULTIPORT_DESTINATION:
+ xt_xlate_add(xl, "dport ");
+ break;
+ case XT_MULTIPORT_EITHER:
+ return 0;
+ }
+
+ if (multiinfo->count > 1)
+ xt_xlate_add(xl, "{ ");
+
+ for (i = 0; i < multiinfo->count; i++)
+ xt_xlate_add(xl, "%s%u", i ? "," : "", multiinfo->ports[i]);
+
+ if (multiinfo->count > 1)
+ xt_xlate_add(xl, "}");
+
+ xt_xlate_add(xl, " ");
+
+ return 1;
+}
+
+static int multiport_xlate(const void *ip, const struct xt_entry_match *match,
+ struct xt_xlate *xl, int numeric)
+{
+ uint8_t proto = ((const struct ipt_ip *)ip)->proto;
+
+ xt_xlate_add(xl, "%s ", proto_to_name(proto));
+ return __multiport_xlate(ip, match, xl, numeric);
+}
+
+static int multiport_xlate6(const void *ip, const struct xt_entry_match *match,
+ struct xt_xlate *xl, int numeric)
+{
+ uint8_t proto = ((const struct ip6t_ip6 *)ip)->proto;
+
+ xt_xlate_add(xl, "%s ", proto_to_name(proto));
+ return __multiport_xlate(ip, match, xl, numeric);
+}
+
+static int __multiport_xlate_v1(const void *ip,
+ const struct xt_entry_match *match,
+ struct xt_xlate *xl, int numeric)
+{
+ const struct xt_multiport_v1 *multiinfo
+ = (const struct xt_multiport_v1 *)match->data;
+ unsigned int i;
+
+ switch (multiinfo->flags) {
+ case XT_MULTIPORT_SOURCE:
+ xt_xlate_add(xl, "sport ");
+ break;
+ case XT_MULTIPORT_DESTINATION:
+ xt_xlate_add(xl, "dport ");
+ break;
+ case XT_MULTIPORT_EITHER:
+ return 0;
+ }
+
+ if (multiinfo->invert)
+ xt_xlate_add(xl, "!= ");
+
+ if (multiinfo->count > 2 ||
+ (multiinfo->count > 1 && !multiinfo->pflags[0]))
+ xt_xlate_add(xl, "{ ");
+
+ for (i = 0; i < multiinfo->count; i++) {
+ xt_xlate_add(xl, "%s%u", i ? "," : "", multiinfo->ports[i]);
+ if (multiinfo->pflags[i])
+ xt_xlate_add(xl, "-%u", multiinfo->ports[++i]);
+ }
+
+ if (multiinfo->count > 2 ||
+ (multiinfo->count > 1 && !multiinfo->pflags[0]))
+ xt_xlate_add(xl, "}");
+
+ xt_xlate_add(xl, " ");
+
+ return 1;
+}
+
+static int multiport_xlate_v1(const void *ip,
+ const struct xt_entry_match *match,
+ struct xt_xlate *xl, int numeric)
+{
+ uint8_t proto = ((const struct ipt_ip *)ip)->proto;
+
+ xt_xlate_add(xl, "%s ", proto_to_name(proto));
+ return __multiport_xlate_v1(ip, match, xl, numeric);
+}
+
+static int multiport_xlate6_v1(const void *ip,
+ const struct xt_entry_match *match,
+ struct xt_xlate *xl, int numeric)
+{
+ uint8_t proto = ((const struct ip6t_ip6 *)ip)->proto;
+
+ xt_xlate_add(xl, "%s ", proto_to_name(proto));
+ return __multiport_xlate_v1(ip, match, xl, numeric);
+}
+
static struct xtables_match multiport_mt_reg[] = {
{
.family = NFPROTO_IPV4,
@@ -482,6 +593,7 @@ static struct xtables_match multiport_mt_reg[] = {
.print = multiport_print,
.save = multiport_save,
.x6_options = multiport_opts,
+ .xlate = multiport_xlate,
},
{
.family = NFPROTO_IPV6,
@@ -496,6 +608,7 @@ static struct xtables_match multiport_mt_reg[] = {
.print = multiport_print6,
.save = multiport_save6,
.x6_options = multiport_opts,
+ .xlate = multiport_xlate6,
},
{
.family = NFPROTO_IPV4,
@@ -510,6 +623,7 @@ static struct xtables_match multiport_mt_reg[] = {
.print = multiport_print_v1,
.save = multiport_save_v1,
.x6_options = multiport_opts,
+ .xlate = multiport_xlate_v1,
},
{
.family = NFPROTO_IPV6,
@@ -524,6 +638,7 @@ static struct xtables_match multiport_mt_reg[] = {
.print = multiport_print6_v1,
.save = multiport_save6_v1,
.x6_options = multiport_opts,
+ .xlate = multiport_xlate6_v1,
},
};
--
2.7.0
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCHv4] extensions: libxt_multiport: Add translation to nft
2016-06-02 17:29 [PATCHv4] extensions: libxt_multiport: Add translation to nft Laura Garcia Liebana
@ 2016-06-06 11:27 ` Pablo Neira Ayuso
0 siblings, 0 replies; 2+ messages in thread
From: Pablo Neira Ayuso @ 2016-06-06 11:27 UTC (permalink / raw)
To: Laura Garcia Liebana; +Cc: netfilter-devel
On Thu, Jun 02, 2016 at 07:29:26PM +0200, Laura Garcia Liebana wrote:
> Add translation for multiport to nftables, which it's supported natively.
>
> Examples:
>
> $ sudo iptables-translate -t filter -A INPUT -p tcp -m multiport --dports 80,81 -j ACCEPT
> nft add rule ip filter INPUT ip protocol tcp tcp dport { 80,81} counter accept
>
> $ sudo iptables-translate -t filter -A INPUT -p tcp -m multiport --dports 80:88 -j ACCEPT
> nft add rule ip filter INPUT ip protocol tcp tcp dport 80-88 counter accept
>
> $ sudo iptables-translate -t filter -A INPUT -p tcp -m multiport ! --dports 80:88 -j ACCEPT
> nft add rule ip filter INPUT ip protocol tcp tcp dport != 80-88 counter accept
Applied.
Please, enable trailing whitespace detection in your editor:
patch:88:
trailing whitespace.
if (multiinfo->count > 2 ||
^
warning: 2 lines add whitespace errors.
Thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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