#include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat_rule.h>
-#define MODULENAME "NETMAP"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Svenning Soerensen <svenning@post5.tele.dk>");
MODULE_DESCRIPTION("iptables 1:1 NAT mapping of IP networks target");
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
-
-static int
+static bool
check(const char *tablename,
const void *e,
const struct xt_target *target,
const struct nf_nat_multi_range_compat *mr = targinfo;
if (!(mr->range[0].flags & IP_NAT_RANGE_MAP_IPS)) {
- DEBUGP(MODULENAME":check: bad MAP_IPS.\n");
- return 0;
+ pr_debug("NETMAP:check: bad MAP_IPS.\n");
+ return false;
}
if (mr->rangesize != 1) {
- DEBUGP(MODULENAME":check: bad rangesize %u.\n", mr->rangesize);
- return 0;
+ pr_debug("NETMAP:check: bad rangesize %u.\n", mr->rangesize);
+ return false;
}
- return 1;
+ return true;
}
static unsigned int
-target(struct sk_buff **pskb,
+target(struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
NF_CT_ASSERT(hooknum == NF_IP_PRE_ROUTING
|| hooknum == NF_IP_POST_ROUTING
|| hooknum == NF_IP_LOCAL_OUT);
- ct = nf_ct_get(*pskb, &ctinfo);
+ ct = nf_ct_get(skb, &ctinfo);
netmask = ~(mr->range[0].min_ip ^ mr->range[0].max_ip);
if (hooknum == NF_IP_PRE_ROUTING || hooknum == NF_IP_LOCAL_OUT)
- new_ip = ip_hdr(*pskb)->daddr & ~netmask;
+ new_ip = ip_hdr(skb)->daddr & ~netmask;
else
- new_ip = ip_hdr(*pskb)->saddr & ~netmask;
+ new_ip = ip_hdr(skb)->saddr & ~netmask;
new_ip |= mr->range[0].min_ip & netmask;
newrange = ((struct nf_nat_range)
return nf_nat_setup_info(ct, &newrange, hooknum);
}
-static struct xt_target target_module = {
- .name = MODULENAME,
+static struct xt_target target_module __read_mostly = {
+ .name = "NETMAP",
.family = AF_INET,
.target = target,
.targetsize = sizeof(struct nf_nat_multi_range_compat),