#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
-MODULE_DESCRIPTION("x_tables match for TCP and UDP(-Lite), supports IPv4 and IPv6");
+MODULE_DESCRIPTION("Xtables: TCP, UDP and UDP-Lite match");
MODULE_LICENSE("GPL");
MODULE_ALIAS("xt_tcp");
MODULE_ALIAS("xt_udp");
bool *hotdrop)
{
/* tcp.doff is only 4 bits, ie. max 15 * 4 bytes */
- u_int8_t _opt[60 - sizeof(struct tcphdr)], *op;
+ const u_int8_t *op;
+ u_int8_t _opt[60 - sizeof(struct tcphdr)];
unsigned int i;
duprintf("tcp_match: finding option\n");
}
static bool
-tcp_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)
+tcp_mt(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 tcphdr _tcph, *th;
+ const struct tcphdr *th;
+ struct tcphdr _tcph;
const struct xt_tcp *tcpinfo = matchinfo;
if (offset) {
/* Called when user tries to insert an entry of this type. */
static bool
-tcp_checkentry(const char *tablename,
- const void *info,
- const struct xt_match *match,
- void *matchinfo,
- unsigned int hook_mask)
+tcp_mt_check(const char *tablename, const void *info,
+ const struct xt_match *match, void *matchinfo,
+ unsigned int hook_mask)
{
const struct xt_tcp *tcpinfo = matchinfo;
}
static bool
-udp_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)
+udp_mt(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 udphdr _udph, *uh;
+ const struct udphdr *uh;
+ struct udphdr _udph;
const struct xt_udp *udpinfo = matchinfo;
/* Must not be a fragment. */
/* Called when user tries to insert an entry of this type. */
static bool
-udp_checkentry(const char *tablename,
- const void *info,
- const struct xt_match *match,
- void *matchinfo,
- unsigned int hook_mask)
+udp_mt_check(const char *tablename, const void *info,
+ const struct xt_match *match, void *matchinfo,
+ unsigned int hook_mask)
{
- const struct xt_tcp *udpinfo = matchinfo;
+ const struct xt_udp *udpinfo = matchinfo;
/* Must specify no unknown invflags */
return !(udpinfo->invflags & ~XT_UDP_INV_MASK);
}
-static struct xt_match xt_tcpudp_match[] __read_mostly = {
+static struct xt_match tcpudp_mt_reg[] __read_mostly = {
{
.name = "tcp",
.family = AF_INET,
- .checkentry = tcp_checkentry,
- .match = tcp_match,
+ .checkentry = tcp_mt_check,
+ .match = tcp_mt,
.matchsize = sizeof(struct xt_tcp),
.proto = IPPROTO_TCP,
.me = THIS_MODULE,
{
.name = "tcp",
.family = AF_INET6,
- .checkentry = tcp_checkentry,
- .match = tcp_match,
+ .checkentry = tcp_mt_check,
+ .match = tcp_mt,
.matchsize = sizeof(struct xt_tcp),
.proto = IPPROTO_TCP,
.me = THIS_MODULE,
{
.name = "udp",
.family = AF_INET,
- .checkentry = udp_checkentry,
- .match = udp_match,
+ .checkentry = udp_mt_check,
+ .match = udp_mt,
.matchsize = sizeof(struct xt_udp),
.proto = IPPROTO_UDP,
.me = THIS_MODULE,
{
.name = "udp",
.family = AF_INET6,
- .checkentry = udp_checkentry,
- .match = udp_match,
+ .checkentry = udp_mt_check,
+ .match = udp_mt,
.matchsize = sizeof(struct xt_udp),
.proto = IPPROTO_UDP,
.me = THIS_MODULE,
{
.name = "udplite",
.family = AF_INET,
- .checkentry = udp_checkentry,
- .match = udp_match,
+ .checkentry = udp_mt_check,
+ .match = udp_mt,
.matchsize = sizeof(struct xt_udp),
.proto = IPPROTO_UDPLITE,
.me = THIS_MODULE,
{
.name = "udplite",
.family = AF_INET6,
- .checkentry = udp_checkentry,
- .match = udp_match,
+ .checkentry = udp_mt_check,
+ .match = udp_mt,
.matchsize = sizeof(struct xt_udp),
.proto = IPPROTO_UDPLITE,
.me = THIS_MODULE,
},
};
-static int __init xt_tcpudp_init(void)
+static int __init tcpudp_mt_init(void)
{
- return xt_register_matches(xt_tcpudp_match,
- ARRAY_SIZE(xt_tcpudp_match));
+ return xt_register_matches(tcpudp_mt_reg, ARRAY_SIZE(tcpudp_mt_reg));
}
-static void __exit xt_tcpudp_fini(void)
+static void __exit tcpudp_mt_exit(void)
{
- xt_unregister_matches(xt_tcpudp_match, ARRAY_SIZE(xt_tcpudp_match));
+ xt_unregister_matches(tcpudp_mt_reg, ARRAY_SIZE(tcpudp_mt_reg));
}
-module_init(xt_tcpudp_init);
-module_exit(xt_tcpudp_fini);
+module_init(tcpudp_mt_init);
+module_exit(tcpudp_mt_exit);