#include <linux/netfilter_ipv6/ip6t_ah.h>
MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("IPv6 AH match");
+MODULE_DESCRIPTION("Xtables: IPv6 IPsec-AH match");
MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#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;
- DEBUGP("ah spi_match:%c 0x%x <= 0x%x <= 0x%x",invert? '!':' ',
- min,spi,max);
+ bool r;
+
+ pr_debug("ah spi_match:%c 0x%x <= 0x%x <= 0x%x",
+ invert ? '!' : ' ', min, spi, max);
r = (spi >= min && spi <= max) ^ invert;
- DEBUGP(" result %s\n",r? "PASS\n" : "FAILED\n");
+ pr_debug(" result %s\n", r ? "PASS" : "FAILED");
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
+ah_mt6(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)
{
- struct ip_auth_hdr *ah, _ah;
+ struct ip_auth_hdr _ah;
+ const struct ip_auth_hdr *ah;
const struct ip6t_ah *ahinfo = matchinfo;
unsigned int ptr;
unsigned int hdrlen = 0;
if (err < 0) {
if (err != -ENOENT)
*hotdrop = true;
- return 0;
+ return false;
}
ah = skb_header_pointer(skb, ptr, sizeof(_ah), &_ah);
if (ah == NULL) {
*hotdrop = true;
- return 0;
+ return false;
}
hdrlen = (ah->hdrlen + 2) << 2;
- DEBUGP("IPv6 AH LEN %u %u ", hdrlen, ah->hdrlen);
- DEBUGP("RES %04X ", ah->reserved);
- DEBUGP("SPI %u %08X\n", ntohl(ah->spi), ntohl(ah->spi));
-
- DEBUGP("IPv6 AH spi %02X ",
- (spi_match(ahinfo->spis[0], ahinfo->spis[1],
- ntohl(ah->spi),
- !!(ahinfo->invflags & IP6T_AH_INV_SPI))));
- DEBUGP("len %02X %04X %02X ",
- ahinfo->hdrlen, hdrlen,
- (!ahinfo->hdrlen ||
- (ahinfo->hdrlen == hdrlen) ^
- !!(ahinfo->invflags & IP6T_AH_INV_LEN)));
- DEBUGP("res %02X %04X %02X\n",
- ahinfo->hdrres, ah->reserved,
- !(ahinfo->hdrres && ah->reserved));
+ pr_debug("IPv6 AH LEN %u %u ", hdrlen, ah->hdrlen);
+ pr_debug("RES %04X ", ah->reserved);
+ pr_debug("SPI %u %08X\n", ntohl(ah->spi), ntohl(ah->spi));
+
+ pr_debug("IPv6 AH spi %02X ",
+ spi_match(ahinfo->spis[0], ahinfo->spis[1],
+ ntohl(ah->spi),
+ !!(ahinfo->invflags & IP6T_AH_INV_SPI)));
+ pr_debug("len %02X %04X %02X ",
+ ahinfo->hdrlen, hdrlen,
+ (!ahinfo->hdrlen ||
+ (ahinfo->hdrlen == hdrlen) ^
+ !!(ahinfo->invflags & IP6T_AH_INV_LEN)));
+ pr_debug("res %02X %04X %02X\n",
+ ahinfo->hdrres, ah->reserved,
+ !(ahinfo->hdrres && ah->reserved));
return (ah != NULL)
&&
- (spi_match(ahinfo->spis[0], ahinfo->spis[1],
- ntohl(ah->spi),
- !!(ahinfo->invflags & IP6T_AH_INV_SPI)))
+ spi_match(ahinfo->spis[0], ahinfo->spis[1],
+ ntohl(ah->spi),
+ !!(ahinfo->invflags & IP6T_AH_INV_SPI))
&&
(!ahinfo->hdrlen ||
(ahinfo->hdrlen == hdrlen) ^
}
/* Called when user tries to insert an entry of this type. */
-static int
-checkentry(const char *tablename,
- const void *entry,
- const struct xt_match *match,
- void *matchinfo,
- unsigned int hook_mask)
+static bool
+ah_mt6_check(const char *tablename, const void *entry,
+ const struct xt_match *match, void *matchinfo,
+ unsigned int hook_mask)
{
const struct ip6t_ah *ahinfo = matchinfo;
if (ahinfo->invflags & ~IP6T_AH_INV_MASK) {
- DEBUGP("ip6t_ah: unknown flags %X\n", ahinfo->invflags);
- return 0;
+ pr_debug("ip6t_ah: unknown flags %X\n", ahinfo->invflags);
+ return false;
}
- return 1;
+ return true;
}
-static struct xt_match ah_match = {
+static struct xt_match ah_mt6_reg __read_mostly = {
.name = "ah",
.family = AF_INET6,
- .match = match,
+ .match = ah_mt6,
.matchsize = sizeof(struct ip6t_ah),
- .checkentry = checkentry,
+ .checkentry = ah_mt6_check,
.me = THIS_MODULE,
};
-static int __init ip6t_ah_init(void)
+static int __init ah_mt6_init(void)
{
- return xt_register_match(&ah_match);
+ return xt_register_match(&ah_mt6_reg);
}
-static void __exit ip6t_ah_fini(void)
+static void __exit ah_mt6_exit(void)
{
- xt_unregister_match(&ah_match);
+ xt_unregister_match(&ah_mt6_reg);
}
-module_init(ip6t_ah_init);
-module_exit(ip6t_ah_fini);
+module_init(ah_mt6_init);
+module_exit(ah_mt6_exit);