* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * 010320 Martin Josefsson <gandalf@wlug.westbo.se>
- * * copied ipt_BALANCE.c to ipt_SAME.c and changed a few things.
- * 010728 Martin Josefsson <gandalf@wlug.westbo.se>
- * * added --nodst to not include destination-ip in new source
- * calculations.
- * * added some more sanity-checks.
- * 010729 Martin Josefsson <gandalf@wlug.westbo.se>
- * * fixed a buggy if-statement in same_check(), should have
- * used ntohl() but didn't.
- * * added support for multiple ranges. IPT_SAME_MAX_RANGE is
- * defined in linux/include/linux/netfilter_ipv4/ipt_SAME.h
- * and is currently set to 10.
- * * added support for 1-address range, nice to have now that
- * we have multiple ranges.
*/
#include <linux/types.h>
#include <linux/ip.h>
#include <net/checksum.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h>
-#ifdef CONFIG_NF_NAT_NEEDED
#include <net/netfilter/nf_nat_rule.h>
-#else
-#include <linux/netfilter_ipv4/ip_nat_rule.h>
-#endif
#include <linux/netfilter_ipv4/ipt_SAME.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Martin Josefsson <gandalf@wlug.westbo.se>");
MODULE_DESCRIPTION("iptables special SNAT module for consistent sourceip");
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
-
-static int
+static bool
same_check(const char *tablename,
const void *e,
const struct xt_target *target,
mr->ipnum = 0;
if (mr->rangesize < 1) {
- DEBUGP("same_check: need at least one dest range.\n");
- return 0;
+ pr_debug("same_check: need at least one dest range.\n");
+ return false;
}
if (mr->rangesize > IPT_SAME_MAX_RANGE) {
- DEBUGP("same_check: too many ranges specified, maximum "
- "is %u ranges\n",
- IPT_SAME_MAX_RANGE);
- return 0;
+ pr_debug("same_check: too many ranges specified, maximum "
+ "is %u ranges\n", IPT_SAME_MAX_RANGE);
+ return false;
}
for (count = 0; count < mr->rangesize; count++) {
if (ntohl(mr->range[count].min_ip) >
ntohl(mr->range[count].max_ip)) {
- DEBUGP("same_check: min_ip is larger than max_ip in "
- "range `%u.%u.%u.%u-%u.%u.%u.%u'.\n",
- NIPQUAD(mr->range[count].min_ip),
- NIPQUAD(mr->range[count].max_ip));
- return 0;
+ pr_debug("same_check: min_ip is larger than max_ip in "
+ "range `%u.%u.%u.%u-%u.%u.%u.%u'.\n",
+ NIPQUAD(mr->range[count].min_ip),
+ NIPQUAD(mr->range[count].max_ip));
+ return false;
}
if (!(mr->range[count].flags & IP_NAT_RANGE_MAP_IPS)) {
- DEBUGP("same_check: bad MAP_IPS.\n");
- return 0;
+ pr_debug("same_check: bad MAP_IPS.\n");
+ return false;
}
rangeip = (ntohl(mr->range[count].max_ip) -
ntohl(mr->range[count].min_ip) + 1);
mr->ipnum += rangeip;
- DEBUGP("same_check: range %u, ipnum = %u\n", count, rangeip);
+ pr_debug("same_check: range %u, ipnum = %u\n", count, rangeip);
}
- DEBUGP("same_check: total ipaddresses = %u\n", mr->ipnum);
+ pr_debug("same_check: total ipaddresses = %u\n", mr->ipnum);
mr->iparray = kmalloc((sizeof(u_int32_t) * mr->ipnum), GFP_KERNEL);
if (!mr->iparray) {
- DEBUGP("same_check: Couldn't allocate %u bytes "
- "for %u ipaddresses!\n",
- (sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
- return 0;
+ pr_debug("same_check: Couldn't allocate %Zu bytes "
+ "for %u ipaddresses!\n",
+ (sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
+ return false;
}
- DEBUGP("same_check: Allocated %u bytes for %u ipaddresses.\n",
- (sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
+ pr_debug("same_check: Allocated %Zu bytes for %u ipaddresses.\n",
+ (sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
for (count = 0; count < mr->rangesize; count++) {
for (countess = ntohl(mr->range[count].min_ip);
countess <= ntohl(mr->range[count].max_ip);
countess++) {
mr->iparray[index] = countess;
- DEBUGP("same_check: Added ipaddress `%u.%u.%u.%u' "
- "in index %u.\n",
- HIPQUAD(countess), index);
+ pr_debug("same_check: Added ipaddress `%u.%u.%u.%u' "
+ "in index %u.\n", HIPQUAD(countess), index);
index++;
}
}
- return 1;
+ return true;
}
static void
kfree(mr->iparray);
- DEBUGP("same_destroy: Deallocated %u bytes for %u ipaddresses.\n",
- (sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
+ pr_debug("same_destroy: Deallocated %Zu bytes for %u ipaddresses.\n",
+ (sizeof(u_int32_t) * mr->ipnum), mr->ipnum);
}
static unsigned int
-same_target(struct sk_buff **pskb,
+same_target(struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
const struct xt_target *target,
const void *targinfo)
{
- struct ip_conntrack *ct;
+ struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
u_int32_t tmpip, aindex;
__be32 new_ip;
const struct ipt_same_info *same = targinfo;
- struct ip_nat_range newrange;
- const struct ip_conntrack_tuple *t;
+ struct nf_nat_range newrange;
+ const struct nf_conntrack_tuple *t;
- IP_NF_ASSERT(hooknum == NF_IP_PRE_ROUTING ||
+ NF_CT_ASSERT(hooknum == NF_IP_PRE_ROUTING ||
hooknum == NF_IP_POST_ROUTING);
- ct = ip_conntrack_get(*pskb, &ctinfo);
+ ct = nf_ct_get(skb, &ctinfo);
t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
Here we calculate the index in same->iparray which
holds the ipaddress we should use */
-#ifdef CONFIG_NF_NAT_NEEDED
tmpip = ntohl(t->src.u3.ip);
if (!(same->info & IPT_SAME_NODST))
tmpip += ntohl(t->dst.u3.ip);
-#else
- tmpip = ntohl(t->src.ip);
-
- if (!(same->info & IPT_SAME_NODST))
- tmpip += ntohl(t->dst.ip);
-#endif
aindex = tmpip % same->ipnum;
new_ip = htonl(same->iparray[aindex]);
- DEBUGP("ipt_SAME: src=%u.%u.%u.%u dst=%u.%u.%u.%u, "
- "new src=%u.%u.%u.%u\n",
- NIPQUAD(t->src.ip), NIPQUAD(t->dst.ip),
- NIPQUAD(new_ip));
+ pr_debug("ipt_SAME: src=%u.%u.%u.%u dst=%u.%u.%u.%u, "
+ "new src=%u.%u.%u.%u\n",
+ NIPQUAD(t->src.u3.ip), NIPQUAD(t->dst.u3.ip), NIPQUAD(new_ip));
/* Transfer from original range. */
- newrange = ((struct ip_nat_range)
+ newrange = ((struct nf_nat_range)
{ same->range[0].flags, new_ip, new_ip,
/* FIXME: Use ports from correct range! */
same->range[0].min, same->range[0].max });
/* Hand modified range to generic setup. */
- return ip_nat_setup_info(ct, &newrange, hooknum);
+ return nf_nat_setup_info(ct, &newrange, hooknum);
}
-static struct xt_target same_reg = {
+static struct xt_target same_reg __read_mostly = {
.name = "SAME",
.family = AF_INET,
.target = same_target,
projects / linux-2.6 / blobdiff