* published by the Free Software Foundation.
*/
+#include <linux/in.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/netfilter_ipv4/ipt_ah.h>
-#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter/x_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yon Uriarte <yon@astaro.de>");
#endif
/* Returns 1 if the spi is matched by the range, 0 otherwise */
-static inline int
-spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, int invert)
+static inline bool
+spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, bool invert)
{
- int r=0;
- duprintf("ah spi_match:%c 0x%x <= 0x%x <= 0x%x",invert? '!':' ',
- min,spi,max);
+ bool r;
+ duprintf("ah spi_match:%c 0x%x <= 0x%x <= 0x%x",invert? '!':' ',
+ min,spi,max);
r=(spi >= min && spi <= max) ^ invert;
duprintf(" result %s\n",r? "PASS" : "FAILED");
return r;
}
-static int
+static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
+ const struct xt_match *match,
const void *matchinfo,
int offset,
- int *hotdrop)
+ unsigned int protoff,
+ bool *hotdrop)
{
struct ip_auth_hdr _ahdr, *ah;
const struct ipt_ah *ahinfo = matchinfo;
/* Must not be a fragment. */
if (offset)
- return 0;
+ return false;
- ah = skb_header_pointer(skb, skb->nh.iph->ihl * 4,
+ ah = skb_header_pointer(skb, protoff,
sizeof(_ahdr), &_ahdr);
if (ah == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("Dropping evil AH tinygram.\n");
- *hotdrop = 1;
+ *hotdrop = true;
return 0;
}
/* Called when user tries to insert an entry of this type. */
static int
checkentry(const char *tablename,
- const struct ipt_ip *ip,
+ const void *ip_void,
+ const struct xt_match *match,
void *matchinfo,
- unsigned int matchinfosize,
unsigned int hook_mask)
{
const struct ipt_ah *ahinfo = matchinfo;
- /* Must specify proto == AH, and no unknown invflags */
- if (ip->proto != IPPROTO_AH || (ip->invflags & IPT_INV_PROTO)) {
- duprintf("ipt_ah: Protocol %u != %u\n", ip->proto,
- IPPROTO_AH);
- return 0;
- }
- if (matchinfosize != IPT_ALIGN(sizeof(struct ipt_ah))) {
- duprintf("ipt_ah: matchsize %u != %u\n",
- matchinfosize, IPT_ALIGN(sizeof(struct ipt_ah)));
- return 0;
- }
+ /* Must specify no unknown invflags */
if (ahinfo->invflags & ~IPT_AH_INV_MASK) {
- duprintf("ipt_ah: unknown flags %X\n",
- ahinfo->invflags);
+ duprintf("ipt_ah: unknown flags %X\n", ahinfo->invflags);
return 0;
}
-
return 1;
}
-static struct ipt_match ah_match = {
+static struct xt_match ah_match = {
.name = "ah",
- .match = &match,
- .checkentry = &checkentry,
+ .family = AF_INET,
+ .match = match,
+ .matchsize = sizeof(struct ipt_ah),
+ .proto = IPPROTO_AH,
+ .checkentry = checkentry,
.me = THIS_MODULE,
};
-static int __init init(void)
+static int __init ipt_ah_init(void)
{
- return ipt_register_match(&ah_match);
+ return xt_register_match(&ah_match);
}
-static void __exit cleanup(void)
+static void __exit ipt_ah_fini(void)
{
- ipt_unregister_match(&ah_match);
+ xt_unregister_match(&ah_match);
}
-module_init(init);
-module_exit(cleanup);
+module_init(ipt_ah_init);
+module_exit(ipt_ah_fini);