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authorJo-Philipp Wich <jow@openwrt.org>2014-08-09 14:36:10 +0000
committerJo-Philipp Wich <jow@openwrt.org>2014-08-09 14:36:10 +0000
commit56be9f4a9a69072cdaa38473155d609aea1ea6e4 (patch)
treef4a1d774c34886f92976a7fd1480a9e40419bf6a /target/linux/generic/patches-3.14
parent9aeb0cff11455697e3d604befa30146928702d80 (diff)
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netfilter: support /proc conntrack flushing of specific ip addresses
Signed-off-by: Jo-Philipp Wich <jow@openwrt.org> SVN-Revision: 42092
Diffstat (limited to 'target/linux/generic/patches-3.14')
-rw-r--r--target/linux/generic/patches-3.14/604-netfilter_conntrack_flush.patch57
1 files changed, 47 insertions, 10 deletions
diff --git a/target/linux/generic/patches-3.14/604-netfilter_conntrack_flush.patch b/target/linux/generic/patches-3.14/604-netfilter_conntrack_flush.patch
index 984aed0..1b5e2ab 100644
--- a/target/linux/generic/patches-3.14/604-netfilter_conntrack_flush.patch
+++ b/target/linux/generic/patches-3.14/604-netfilter_conntrack_flush.patch
@@ -1,12 +1,35 @@
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
-@@ -268,10 +268,34 @@ static int ct_open(struct inode *inode,
+@@ -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>
+@@ -268,10 +269,63 @@ static int ct_open(struct inode *inode,
sizeof(struct ct_iter_state));
}
-+static int kill_all(struct nf_conn *i, void *data)
++struct kill_request {
++ u16 family;
++ union nf_inet_addr addr;
++};
++
++static int kill_matching(struct nf_conn *i, void *data)
+{
-+ return 1;
++ struct kill_request *kr = data;
++ struct nf_conntrack_tuple *t = &i->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
++
++ if (!kr->family)
++ return 1;
++
++ if (t->src.l3num != kr->family)
++ return 0;
++
++ return (nf_inet_addr_cmp(&kr->addr, &t->src.u3) ||
++ nf_inet_addr_cmp(&kr->addr, &t->dst.u3));
+}
+
+static ssize_t ct_file_write(struct file *file, const char __user *buf,
@@ -14,16 +37,30 @@
+{
+ struct seq_file *seq = file->private_data;
+ struct net *net = seq_file_net(seq);
++ struct kill_request kr = { };
++ char req[INET6_ADDRSTRLEN] = { };
+
-+ if (count) {
-+ char c;
++ if (count == 0)
++ return 0;
+
-+ if (get_user(c, buf))
-+ return -EFAULT;
++ if (count >= INET6_ADDRSTRLEN)
++ count = INET6_ADDRSTRLEN - 1;
+
-+ if (c == 'f')
-+ nf_ct_iterate_cleanup(net, kill_all, NULL, 0, 0);
++ 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);
++
+ return count;
+}
+
@@ -35,7 +72,7 @@
.llseek = seq_lseek,
.release = seq_release_net,
};
-@@ -373,7 +397,7 @@ static int nf_conntrack_standalone_init_
+@@ -373,7 +427,7 @@ static int nf_conntrack_standalone_init_
{
struct proc_dir_entry *pde;