From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../600-netfilter_conntrack_flush.patch            | 86 ++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 target/linux/generic/patches-4.0/600-netfilter_conntrack_flush.patch

(limited to 'target/linux/generic/patches-4.0/600-netfilter_conntrack_flush.patch')

diff --git a/target/linux/generic/patches-4.0/600-netfilter_conntrack_flush.patch b/target/linux/generic/patches-4.0/600-netfilter_conntrack_flush.patch
new file mode 100644
index 0000000..bd7a7ff
--- /dev/null
+++ b/target/linux/generic/patches-4.0/600-netfilter_conntrack_flush.patch
@@ -0,0 +1,86 @@
+--- a/net/netfilter/nf_conntrack_standalone.c
++++ b/net/netfilter/nf_conntrack_standalone.c
+@@ -17,6 +17,7 @@
+ #include <linux/percpu.h>
+ #include <linux/netdevice.h>
+ #include <linux/security.h>
++#include <linux/inet.h>
+ #include <net/net_namespace.h>
+ #ifdef CONFIG_SYSCTL
+ #include <linux/sysctl.h>
+@@ -259,10 +260,66 @@ static int ct_open(struct inode *inode,
+ 			sizeof(struct ct_iter_state));
+ }
+ 
++struct kill_request {
++	u16 family;
++	union nf_inet_addr addr;
++};
++
++static int kill_matching(struct nf_conn *i, void *data)
++{
++	struct kill_request *kr = data;
++	struct nf_conntrack_tuple *t1 = &i->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
++	struct nf_conntrack_tuple *t2 = &i->tuplehash[IP_CT_DIR_REPLY].tuple;
++
++	if (!kr->family)
++		return 1;
++
++	if (t1->src.l3num != kr->family)
++		return 0;
++
++	return (nf_inet_addr_cmp(&kr->addr, &t1->src.u3) ||
++	        nf_inet_addr_cmp(&kr->addr, &t1->dst.u3) ||
++	        nf_inet_addr_cmp(&kr->addr, &t2->src.u3) ||
++	        nf_inet_addr_cmp(&kr->addr, &t2->dst.u3));
++}
++
++static ssize_t ct_file_write(struct file *file, const char __user *buf,
++			     size_t count, loff_t *ppos)
++{
++	struct seq_file *seq = file->private_data;
++	struct net *net = seq_file_net(seq);
++	struct kill_request kr = { };
++	char req[INET6_ADDRSTRLEN] = { };
++
++	if (count == 0)
++		return 0;
++
++	if (count >= INET6_ADDRSTRLEN)
++		count = INET6_ADDRSTRLEN - 1;
++
++	if (copy_from_user(req, buf, count))
++		return -EFAULT;
++
++	if (strnchr(req, count, ':')) {
++		kr.family = AF_INET6;
++		if (!in6_pton(req, count, (void *)&kr.addr, '\n', NULL))
++			return -EINVAL;
++	} else if (strnchr(req, count, '.')) {
++		kr.family = AF_INET;
++		if (!in4_pton(req, count, (void *)&kr.addr, '\n', NULL))
++			return -EINVAL;
++	}
++
++	nf_ct_iterate_cleanup(net, kill_matching, &kr, 0, 0);
++
++	return count;
++}
++
+ static const struct file_operations ct_file_ops = {
+ 	.owner   = THIS_MODULE,
+ 	.open    = ct_open,
+ 	.read    = seq_read,
++	.write	 = ct_file_write,
+ 	.llseek  = seq_lseek,
+ 	.release = seq_release_net,
+ };
+@@ -364,7 +421,7 @@ static int nf_conntrack_standalone_init_
+ {
+ 	struct proc_dir_entry *pde;
+ 
+-	pde = proc_create("nf_conntrack", 0440, net->proc_net, &ct_file_ops);
++	pde = proc_create("nf_conntrack", 0660, net->proc_net, &ct_file_ops);
+ 	if (!pde)
+ 		goto out_nf_conntrack;
+ 
-- 
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