* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/types.h>
#include <linux/udp.h>
MODULE_ALIAS("ipt_multiport");
MODULE_ALIAS("ip6t_multiport");
-#if 0
-#define duprintf(format, args...) printk(format , ## args)
-#else
-#define duprintf(format, args...)
-#endif
-
-/* Returns 1 if the port is matched by the test, 0 otherwise. */
-static inline bool
-ports_match_v0(const u_int16_t *portlist, enum xt_multiport_flags flags,
- u_int8_t count, u_int16_t src, u_int16_t dst)
-{
- unsigned int i;
- for (i = 0; i < count; i++) {
- if (flags != XT_MULTIPORT_DESTINATION && portlist[i] == src)
- return true;
-
- if (flags != XT_MULTIPORT_SOURCE && portlist[i] == dst)
- return true;
- }
-
- return false;
-}
-
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline bool
ports_match_v1(const struct xt_multiport_v1 *minfo,
if (minfo->pflags[i]) {
/* range port matching */
e = minfo->ports[++i];
- duprintf("src or dst matches with %d-%d?\n", s, e);
+ pr_debug("src or dst matches with %d-%d?\n", s, e);
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src >= s && src <= e)
return true ^ minfo->invert;
} else {
/* exact port matching */
- duprintf("src or dst matches with %d?\n", s);
+ pr_debug("src or dst matches with %d?\n", s);
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src == s)
}
static bool
-multiport_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
-{
- const __be16 *pptr;
- __be16 _ports[2];
- const struct xt_multiport *multiinfo = par->matchinfo;
-
- if (par->fragoff != 0)
- return false;
-
- pptr = skb_header_pointer(skb, par->thoff, sizeof(_ports), _ports);
- if (pptr == NULL) {
- /* We've been asked to examine this packet, and we
- * can't. Hence, no choice but to drop.
- */
- duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
- *par->hotdrop = true;
- return false;
- }
-
- return ports_match_v0(multiinfo->ports, multiinfo->flags,
- multiinfo->count, ntohs(pptr[0]), ntohs(pptr[1]));
-}
-
-static bool
-multiport_mt(const struct sk_buff *skb, const struct xt_match_param *par)
+multiport_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const __be16 *pptr;
__be16 _ports[2];
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
- duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
- *par->hotdrop = true;
+ pr_debug("Dropping evil offset=0 tinygram.\n");
+ par->hotdrop = true;
return false;
}
&& count <= XT_MULTI_PORTS;
}
-static bool multiport_mt_check_v0(const struct xt_mtchk_param *par)
-{
- const struct ipt_ip *ip = par->entryinfo;
- const struct xt_multiport *multiinfo = par->matchinfo;
-
- return check(ip->proto, ip->invflags, multiinfo->flags,
- multiinfo->count);
-}
-
-static bool multiport_mt_check(const struct xt_mtchk_param *par)
+static int multiport_mt_check(const struct xt_mtchk_param *par)
{
const struct ipt_ip *ip = par->entryinfo;
const struct xt_multiport_v1 *multiinfo = par->matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
- multiinfo->count);
+ multiinfo->count) ? 0 : -EINVAL;
}
-static bool multiport_mt6_check_v0(const struct xt_mtchk_param *par)
-{
- const struct ip6t_ip6 *ip = par->entryinfo;
- const struct xt_multiport *multiinfo = par->matchinfo;
-
- return check(ip->proto, ip->invflags, multiinfo->flags,
- multiinfo->count);
-}
-
-static bool multiport_mt6_check(const struct xt_mtchk_param *par)
+static int multiport_mt6_check(const struct xt_mtchk_param *par)
{
const struct ip6t_ip6 *ip = par->entryinfo;
const struct xt_multiport_v1 *multiinfo = par->matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
- multiinfo->count);
+ multiinfo->count) ? 0 : -EINVAL;
}
static struct xt_match multiport_mt_reg[] __read_mostly = {
- {
- .name = "multiport",
- .family = NFPROTO_IPV4,
- .revision = 0,
- .checkentry = multiport_mt_check_v0,
- .match = multiport_mt_v0,
- .matchsize = sizeof(struct xt_multiport),
- .me = THIS_MODULE,
- },
{
.name = "multiport",
.family = NFPROTO_IPV4,
.matchsize = sizeof(struct xt_multiport_v1),
.me = THIS_MODULE,
},
- {
- .name = "multiport",
- .family = NFPROTO_IPV6,
- .revision = 0,
- .checkentry = multiport_mt6_check_v0,
- .match = multiport_mt_v0,
- .matchsize = sizeof(struct xt_multiport),
- .me = THIS_MODULE,
- },
{
.name = "multiport",
.family = NFPROTO_IPV6,