***************************************************************************/
#include <linux/module.h>
+#include <linux/version.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <net/icmp.h>
/* Mutex (semaphore) used for manipulating userspace handles/snapshot data */
static struct semaphore ipt_acc_userspace_mutex;
+/* Allocates a page and clears it */
+static void *ipt_acc_zalloc_page(void)
+{
+ // Don't use get_zeroed_page until it's fixed in the kernel.
+ // get_zeroed_page(GFP_ATOMIC)
+ void *mem = (void *)__get_free_page(GFP_ATOMIC);
+ if (mem) {
+ memset (mem, 0, PAGE_SIZE);
+ }
+
+ return mem;
+}
/* Recursive free of all data structures */
static void ipt_acc_data_free(void *data, unsigned char depth)
ipt_acc_tables[i].refcount++;
if ((ipt_acc_tables[i].data
- = (void *)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ = ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: out of memory for data of table: %s\n", name);
memset(&ipt_acc_tables[i], 0,
sizeof(struct ipt_acc_table));
}
static int ipt_acc_checkentry(const char *tablename,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
const void *e,
+#else
+ const struct ipt_entry *e,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_target *target,
+#endif
void *targinfo,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
unsigned int targinfosize,
+#endif
unsigned int hook_mask)
{
struct ipt_acc_info *info = targinfo;
int table_nr;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
+ if (targinfosize != IPT_ALIGN(sizeof(struct ipt_acc_info))) {
+ DEBUGP("ACCOUNT: targinfosize %u != %u\n",
+ targinfosize, IPT_ALIGN(sizeof(struct ipt_acc_info)));
+ return 0;
+ }
+#endif
+
spin_lock_bh(&ipt_acc_lock);
table_nr = ipt_acc_table_insert(info->table_name, info->net_ip,
info->net_mask);
return 1;
}
-static void ipt_acc_destroy(const struct xt_target *target, void *targinfo, unsigned int targinfosize)
+static void ipt_acc_destroy(
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
+ const struct xt_target *target,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
+ void *targinfo)
+#else
+ void *targinfo,
+ unsigned int targinfosize)
+#endif
{
unsigned int i;
struct ipt_acc_info *info = targinfo;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
if (targinfosize != IPT_ALIGN(sizeof(struct ipt_acc_info))) {
DEBUGP("ACCOUNT: targinfosize %u != %u\n",
targinfosize, IPT_ALIGN(sizeof(struct ipt_acc_info)));
}
+#endif
spin_lock_bh(&ipt_acc_lock);
/* Do we need to create a new mask_24 bucket? */
if (!mask_16->mask_24[slot] && (mask_16->mask_24[slot] =
- (void *)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: Can't process packet because out of memory!\n");
return;
}
/* Do we need to create a new mask_24 bucket? */
if (!mask_16->mask_24[slot] && (mask_16->mask_24[slot]
- = (void *)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ = ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUT: Can't process packet because out of memory!\n");
return;
}
/* Do we need to create a new mask_24 bucket? */
if (!mask_8->mask_16[slot] && (mask_8->mask_16[slot]
- = (void *)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ = ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: Can't process packet because out of memory!\n");
return;
}
/* Do we need to create a new mask_24 bucket? */
if (!mask_8->mask_16[slot] && (mask_8->mask_16[slot]
- = (void *)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ = ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: Can't process packet because out of memory!\n");
return;
}
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_target *target,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
+ const void *targinfo)
+#else
const void *targinfo,
void *userinfo)
+#endif
{
const struct ipt_acc_info *info =
(const struct ipt_acc_info *)targinfo;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
+ u_int32_t src_ip = ip_hdr(*pskb)->saddr;
+ u_int32_t dst_ip = ip_hdr(*pskb)->daddr;
+ u_int32_t size = ntohs(ip_hdr(*pskb)->tot_len);
+#else
u_int32_t src_ip = (*pskb)->nh.iph->saddr;
u_int32_t dst_ip = (*pskb)->nh.iph->daddr;
u_int32_t size = ntohs((*pskb)->nh.iph->tot_len);
+#endif
spin_lock_bh(&ipt_acc_lock);
dest->itemcount = ipt_acc_tables[table_nr].itemcount;
/* allocate "root" table */
- if ((dest->data = (void*)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ if ((dest->data = ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: out of memory for root table "
"in ipt_acc_handle_prepare_read()\n");
return -1;
for (b = 0; b <= 255; b++) {
if (src_16->mask_24[b]) {
if ((network_16->mask_24[b] =
- (void*)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: out of memory during copy of 16 bit "
"network in ipt_acc_handle_prepare_read()\n");
ipt_acc_data_free(dest->data, depth);
for (a = 0; a <= 255; a++) {
if (src_8->mask_16[a]) {
if ((network_8->mask_16[a] =
- (void*)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: out of memory during copy of 24 bit network"
" in ipt_acc_handle_prepare_read()\n");
ipt_acc_data_free(dest->data, depth);
for (b = 0; b <= 255; b++) {
if (src_16->mask_24[b]) {
if ((network_16->mask_24[b] =
- (void*)get_zeroed_page(GFP_ATOMIC)) == NULL) {
+ ipt_acc_zalloc_page()) == NULL) {
printk("ACCOUNT: out of memory during copy of 16 bit"
" network in ipt_acc_handle_prepare_read()\n");
ipt_acc_data_free(dest->data, depth);
}
/* Try to allocate memory */
- if (!(new_data_page = (void*)get_zeroed_page(GFP_ATOMIC))) {
+ if (!(new_data_page = ipt_acc_zalloc_page())) {
printk("ACCOUNT: ipt_acc_handle_prepare_read_flush(): "
"Out of memory!\n");
return -1;
switch (cmd) {
case IPT_SO_SET_ACCOUNT_HANDLE_FREE:
if (len != sizeof(struct ipt_acc_handle_sockopt)) {
- printk("ACCOUNT: ipt_acc_set_ctl: wrong data size (%u != %lu) "
+ printk("ACCOUNT: ipt_acc_set_ctl: wrong data size (%u != %u) "
"for IPT_SO_SET_HANDLE_FREE\n",
len, sizeof(struct ipt_acc_handle_sockopt));
break;
struct ipt_acc_handle dest;
if (*len < sizeof(struct ipt_acc_handle_sockopt)) {
- printk("ACCOUNT: ipt_acc_get_ctl: wrong data size (%u != %lu) "
+ printk("ACCOUNT: ipt_acc_get_ctl: wrong data size (%u != %u) "
"for IPT_SO_GET_ACCOUNT_PREPARE_READ/READ_FLUSH\n",
*len, sizeof(struct ipt_acc_handle_sockopt));
break;
}
case IPT_SO_GET_ACCOUNT_GET_DATA:
if (*len < sizeof(struct ipt_acc_handle_sockopt)) {
- printk("ACCOUNT: ipt_acc_get_ctl: wrong data size (%u != %lu)"
+ printk("ACCOUNT: ipt_acc_get_ctl: wrong data size (%u != %u)"
" for IPT_SO_GET_ACCOUNT_PREPARE_READ/READ_FLUSH\n",
*len, sizeof(struct ipt_acc_handle_sockopt));
break;
if (*len < ipt_acc_handles[handle.handle_nr].itemcount
* sizeof(struct ipt_acc_handle_ip)) {
- printk("ACCOUNT: ipt_acc_get_ctl: not enough space (%u < %lu)"
+ printk("ACCOUNT: ipt_acc_get_ctl: not enough space (%u < %u)"
" to store data from IPT_SO_GET_ACCOUNT_GET_DATA\n",
*len, ipt_acc_handles[handle.handle_nr].itemcount
* sizeof(struct ipt_acc_handle_ip));
case IPT_SO_GET_ACCOUNT_GET_HANDLE_USAGE: {
unsigned int i;
if (*len < sizeof(struct ipt_acc_handle_sockopt)) {
- printk("ACCOUNT: ipt_acc_get_ctl: wrong data size (%u != %lu)"
+ printk("ACCOUNT: ipt_acc_get_ctl: wrong data size (%u != %u)"
" for IPT_SO_GET_ACCOUNT_GET_HANDLE_USAGE\n",
*len, sizeof(struct ipt_acc_handle_sockopt));
break;
return ret;
}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
+static struct xt_target xt_acc_reg = {
+#else
static struct ipt_target ipt_acc_reg = {
+#endif
.name = "ACCOUNT",
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
+ .family = AF_INET,
+#endif
.target = ipt_acc_target,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
.targetsize = sizeof(struct ipt_acc_info),
+#endif
.checkentry = ipt_acc_checkentry,
.destroy = ipt_acc_destroy,
.me = THIS_MODULE
printk("ACCOUNT: Out of memory allocating account_tables structure");
goto error_cleanup;
}
- memset(ipt_acc_tables, 0,
+ memset(ipt_acc_tables, 0,
ACCOUNT_MAX_TABLES * sizeof(struct ipt_acc_table));
if ((ipt_acc_handles =
printk("ACCOUNT: Out of memory allocating account_handles structure");
goto error_cleanup;
}
- memset(ipt_acc_handles, 0,
+ memset(ipt_acc_handles, 0,
ACCOUNT_MAX_HANDLES * sizeof(struct ipt_acc_handle));
/* Allocate one page as temporary storage */
goto error_cleanup;
}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
+ if (xt_register_target(&xt_acc_reg))
+#else
if (ipt_register_target(&ipt_acc_reg))
+#endif
goto error_cleanup;
return 0;
static void __exit fini(void)
{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
+ xt_unregister_target(&xt_acc_reg);
+#else
ipt_unregister_target(&ipt_acc_reg);
+#endif
nf_unregister_sockopt(&ipt_acc_sockopts);
git://developer.intra2net.com / ipt_ACCOUNT / blobdiff