static spinlock_t ipt_account_lock = SPIN_LOCK_UNLOCKED;
-static unsigned int
-ipt_account_target(struct sk_buff **pskb,
- unsigned int hooknum,
- const struct net_device *in,
- const struct net_device *out,
- const void *targinfo,
- void *userinfo)
-{
- spin_lock_bh(&ipt_account_lock);
- spin_unlock_bh(&ipt_account_lock);
-
- return IPT_CONTINUE;
-}
-
/* Recursive free of all data structures */
void ipt_account_data_free(void *data, unsigned char depth)
{
spin_unlock_bh(&ipt_account_lock);
}
+void ipt_account_depth0_insert(struct ipt_account_mask_24 *mask_24, unsigned int net_ip, unsigned int netmask,
+ unsigned int src_ip, unsigned int dst_ip, unsigned int size, unsigned int *itemcount)
+{
+ unsigned char is_src = 0, is_dst = 0;
+
+ DEBUGP("ACCOUNT: ipt_account_depth0_insert: %u.%u.%u.%u/%u.%u.%u.%u for net %u.%u.%u.%u/%u.%u.%u.%u, size: %u\n",
+ NIPQUAD(src_ip), NIPQUAD(dst_ip), NIPQUAD(net_ip), NIPQUAD(netmask), size);
+
+ // Check if src/dst is inside our network.
+ // Special: net_ip = 0.0.0.0/0 gets stored as src in slot 0
+ if (!netmask)
+ src_ip = 0;
+ if ((net_ip&netmask) == (src_ip&netmask))
+ is_src = 1;
+ if ((net_ip&netmask) == (dst_ip&netmask) && netmask)
+ is_dst = 1;
+
+ if (!is_src && !is_dst)
+ {
+ DEBUGP("ACCOUNT: Skipping packet %u.%u.%u.%u/%u.%u.%u.%u for net %u.%u.%u.%u/%u.%u.%u.%u\n",
+ NIPQUAD(src_ip), NIPQUAD(dst_ip), NIPQUAD(net_ip), NIPQUAD(netmask));
+ return;
+ }
+
+ // Check if this entry is new
+ char is_new_ip = 0;
+
+ // Increase size counters
+ if (is_src)
+ {
+ // Calculate network slot
+ unsigned char slot = (unsigned char)((src_ip&0xFF000000) >> 24);
+ DEBUGP("ACCOUNT: Calculated SRC 8 bit network slot: %d\n", slot);
+ if (!mask_24->ip[slot].src_packets && !mask_24->ip[slot].dst_packets)
+ is_new_ip = 1;
+
+ mask_24->ip[slot].src_packets++;
+ mask_24->ip[slot].src_bytes+=size;
+ }
+ if (is_dst)
+ {
+ unsigned char slot = (unsigned char)((dst_ip&0xFF000000) >> 24);
+ DEBUGP("ACCOUNT: Calculated DST 8 bit network slot: %d\n", slot);
+ if (!mask_24->ip[slot].src_packets && !mask_24->ip[slot].dst_packets)
+ is_new_ip = 1;
+
+ mask_24->ip[slot].dst_packets++;
+ mask_24->ip[slot].dst_bytes+=size;
+ }
+
+ if (is_new_ip)
+ (*itemcount)++;
+}
+
+void ipt_account_depth1_insert(struct ipt_account_mask_16 *mask_16, unsigned int net_ip, unsigned int netmask,
+ unsigned int src_ip, unsigned int dst_ip, unsigned int size, unsigned int *itemcount)
+{
+ // Do we need to process src IP?
+ if ((net_ip&netmask) == (src_ip&netmask))
+ {
+ unsigned char slot = (unsigned char)((src_ip&0x00FF0000) >> 16);
+ DEBUGP("ACCOUNT: Calculated SRC 16 bit network slot: %d\n", slot);
+
+ // 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_KERNEL)))
+ {
+ printk("ACCOUNT: Can't process packet because out of memory!\n");
+ return;
+ }
+
+ ipt_account_depth0_insert((struct ipt_account_mask_24 *)mask_16->mask_24[slot], net_ip, netmask,
+ src_ip, dst_ip, size, itemcount);
+ }
+
+ // Do we need to process dst IP?
+ if ((net_ip&netmask) == (dst_ip&netmask))
+ {
+ unsigned char slot = (unsigned char)((dst_ip&0x00FF0000) >> 16);
+ DEBUGP("ACCOUNT: Calculated DST 16 bit network slot: %d\n", slot);
+
+ // 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_KERNEL)))
+ {
+ printk("ACCOUT: Can't process packet because out of memory!\n");
+ return;
+ }
+
+ ipt_account_depth0_insert((struct ipt_account_mask_24 *)mask_16->mask_24[slot], net_ip, netmask,
+ src_ip, dst_ip, size, itemcount);
+ }
+}
+
+void ipt_account_depth2_insert(struct ipt_account_mask_8 *mask_8, unsigned int net_ip, unsigned int netmask,
+ unsigned int src_ip, unsigned int dst_ip, unsigned int size, unsigned int *itemcount)
+{
+ // Do we need to process src IP?
+ if ((net_ip&netmask) == (src_ip&netmask))
+ {
+ unsigned char slot = (unsigned char)((src_ip&0x0000FF00) >> 8);
+ DEBUGP("ACCOUNT: Calculated SRC 24 bit network slot: %d\n", slot);
+
+ // 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_KERNEL)))
+ {
+ printk("ACCOUNT: Can't process packet because out of memory!\n");
+ return;
+ }
+
+ ipt_account_depth1_insert((struct ipt_account_mask_16 *)mask_8->mask_16[slot], net_ip, netmask,
+ src_ip, dst_ip, size, itemcount);
+ }
+
+ // Do we need to process dst IP?
+ if ((net_ip&netmask) == (dst_ip&netmask))
+ {
+ unsigned char slot = (unsigned char)((dst_ip&0x0000FF00) >> 8);
+ DEBUGP("ACCOUNT: Calculated DST 24 bit network slot: %d\n", slot);
+
+ // 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_KERNEL)))
+ {
+ printk("ACCOUNT: Can't process packet because out of memory!\n");
+ return;
+ }
+
+ ipt_account_depth1_insert((struct ipt_account_mask_16 *)mask_8->mask_16[slot], net_ip, netmask,
+ src_ip, dst_ip, size, itemcount);
+ }
+}
+
+static unsigned int ipt_account_target(struct sk_buff **pskb,
+ unsigned int hooknum,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *targinfo,
+ void *userinfo)
+{
+ const struct ipt_account_info *info = (const struct ipt_account_info *)targinfo;
+ unsigned int src_ip = (*pskb)->nh.iph->saddr;
+ unsigned int dst_ip = (*pskb)->nh.iph->daddr;
+ unsigned int size = ntohs((*pskb)->nh.iph->tot_len);
+
+ spin_lock_bh(&ipt_account_lock);
+
+ if (ipt_account_tables[info->table_nr].name[0] == 0)
+ {
+ printk("ACCOUNT: ipt_account_target: Invalid table id %u. IPs %u.%u.%u.%u/%u.%u.%u.%u\n",
+ info->table_nr, NIPQUAD(src_ip), NIPQUAD(dst_ip));
+ spin_unlock_bh(&ipt_account_lock);
+ return IPT_CONTINUE;
+ }
+
+ // 8 bit network or "any" network
+ if (ipt_account_tables[info->table_nr].depth == 0)
+ {
+ // Count packet and check if the IP is new
+ ipt_account_depth0_insert((struct ipt_account_mask_24 *)ipt_account_tables[info->table_nr].data,
+ ipt_account_tables[info->table_nr].ip, ipt_account_tables[info->table_nr].netmask,
+ src_ip, dst_ip, size, &ipt_account_tables[info->table_nr].itemcount);
+ spin_unlock_bh(&ipt_account_lock);
+ return IPT_CONTINUE;
+ }
+
+ // 16 bit network
+ if (ipt_account_tables[info->table_nr].depth == 1)
+ {
+ ipt_account_depth1_insert((struct ipt_account_mask_16 *)ipt_account_tables[info->table_nr].data,
+ ipt_account_tables[info->table_nr].ip, ipt_account_tables[info->table_nr].netmask,
+ src_ip, dst_ip, size, &ipt_account_tables[info->table_nr].itemcount);
+ spin_unlock_bh(&ipt_account_lock);
+ return IPT_CONTINUE;
+ }
+
+ // 24 bit network
+ if (ipt_account_tables[info->table_nr].depth == 2)
+ {
+ ipt_account_depth2_insert((struct ipt_account_mask_8 *)ipt_account_tables[info->table_nr].data,
+ ipt_account_tables[info->table_nr].ip, ipt_account_tables[info->table_nr].netmask,
+ src_ip, dst_ip, size, &ipt_account_tables[info->table_nr].itemcount);
+ spin_unlock_bh(&ipt_account_lock);
+ return IPT_CONTINUE;
+ }
+
+ printk("ACCOUNT: ipt_account_target: Unable to process packet. Table id %u. IPs %u.%u.%u.%u/%u.%u.%u.%u\n",
+ info->table_nr, NIPQUAD(src_ip), NIPQUAD(dst_ip));
+
+ spin_unlock_bh(&ipt_account_lock);
+ return IPT_CONTINUE;
+}
+
static struct ipt_target ipt_account_reg
= { { NULL, NULL }, "ACCOUNT", ipt_account_target, ipt_account_checkentry, ipt_account_deleteentry,
THIS_MODULE };