MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yon Uriarte <yon@astaro.de>");
-MODULE_DESCRIPTION("x_tables ESP SPI match module");
+MODULE_DESCRIPTION("Xtables: IPsec-ESP packet match");
MODULE_ALIAS("ipt_esp");
MODULE_ALIAS("ip6t_esp");
#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;
+ bool r;
duprintf("esp spi_match:%c 0x%x <= 0x%x <= 0x%x", invert ? '!' : ' ',
min, spi, max);
r = (spi >= min && spi <= max) ^ invert;
return r;
}
-static int
-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,
- unsigned int protoff,
- bool *hotdrop)
+static bool esp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
- struct ip_esp_hdr _esp, *eh;
- const struct xt_esp *espinfo = matchinfo;
+ const struct ip_esp_hdr *eh;
+ struct ip_esp_hdr _esp;
+ const struct xt_esp *espinfo = par->matchinfo;
/* Must not be a fragment. */
- if (offset)
- return 0;
+ if (par->fragoff != 0)
+ return false;
- eh = skb_header_pointer(skb, protoff, sizeof(_esp), &_esp);
+ eh = skb_header_pointer(skb, par->thoff, sizeof(_esp), &_esp);
if (eh == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("Dropping evil ESP tinygram.\n");
- *hotdrop = true;
- return 0;
+ *par->hotdrop = true;
+ return false;
}
return spi_match(espinfo->spis[0], espinfo->spis[1], ntohl(eh->spi),
!!(espinfo->invflags & XT_ESP_INV_SPI));
}
-/* Called when user tries to insert an entry of this type. */
-static int
-checkentry(const char *tablename,
- const void *ip_void,
- const struct xt_match *match,
- void *matchinfo,
- unsigned int hook_mask)
+static bool esp_mt_check(const struct xt_mtchk_param *par)
{
- const struct xt_esp *espinfo = matchinfo;
+ const struct xt_esp *espinfo = par->matchinfo;
if (espinfo->invflags & ~XT_ESP_INV_MASK) {
duprintf("xt_esp: unknown flags %X\n", espinfo->invflags);
- return 0;
+ return false;
}
- return 1;
+ return true;
}
-static struct xt_match xt_esp_match[] = {
+static struct xt_match esp_mt_reg[] __read_mostly = {
{
.name = "esp",
- .family = AF_INET,
- .checkentry = checkentry,
- .match = match,
+ .family = NFPROTO_IPV4,
+ .checkentry = esp_mt_check,
+ .match = esp_mt,
.matchsize = sizeof(struct xt_esp),
.proto = IPPROTO_ESP,
.me = THIS_MODULE,
},
{
.name = "esp",
- .family = AF_INET6,
- .checkentry = checkentry,
- .match = match,
+ .family = NFPROTO_IPV6,
+ .checkentry = esp_mt_check,
+ .match = esp_mt,
.matchsize = sizeof(struct xt_esp),
.proto = IPPROTO_ESP,
.me = THIS_MODULE,
},
};
-static int __init xt_esp_init(void)
+static int __init esp_mt_init(void)
{
- return xt_register_matches(xt_esp_match, ARRAY_SIZE(xt_esp_match));
+ return xt_register_matches(esp_mt_reg, ARRAY_SIZE(esp_mt_reg));
}
-static void __exit xt_esp_cleanup(void)
+static void __exit esp_mt_exit(void)
{
- xt_unregister_matches(xt_esp_match, ARRAY_SIZE(xt_esp_match));
+ xt_unregister_matches(esp_mt_reg, ARRAY_SIZE(esp_mt_reg));
}
-module_init(xt_esp_init);
-module_exit(xt_esp_cleanup);
+module_init(esp_mt_init);
+module_exit(esp_mt_exit);