diff options
Diffstat (limited to 'target/linux/generic/pending-5.10/600-netfilter_conntrack_flush.patch')
-rw-r--r-- | target/linux/generic/pending-5.10/600-netfilter_conntrack_flush.patch | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.10/600-netfilter_conntrack_flush.patch b/target/linux/generic/pending-5.10/600-netfilter_conntrack_flush.patch new file mode 100644 index 0000000000..f82849c356 --- /dev/null +++ b/target/linux/generic/pending-5.10/600-netfilter_conntrack_flush.patch @@ -0,0 +1,88 @@ +From: Felix Fietkau <nbd@nbd.name> +Subject: netfilter: add support for flushing conntrack via /proc + +lede-commit 8193bbe59a74d34d6a26d4a8cb857b1952905314 +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + net/netfilter/nf_conntrack_standalone.c | 59 ++++++++++++++++++++++++++++++++- + 1 file changed, 58 insertions(+), 1 deletion(-) + +--- a/net/netfilter/nf_conntrack_standalone.c ++++ b/net/netfilter/nf_conntrack_standalone.c +@@ -9,6 +9,7 @@ + #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> +@@ -456,6 +457,56 @@ static int ct_cpu_seq_show(struct seq_fi + return 0; + } + ++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 int ct_file_write(struct file *file, char *buf, size_t count) ++{ ++ struct seq_file *seq = file->private_data; ++ struct net *net = seq_file_net(seq); ++ struct kill_request kr = { }; ++ ++ if (count == 0) ++ return 0; ++ ++ if (count >= INET6_ADDRSTRLEN) ++ count = INET6_ADDRSTRLEN - 1; ++ ++ if (strnchr(buf, count, ':')) { ++ kr.family = AF_INET6; ++ if (!in6_pton(buf, count, (void *)&kr.addr, '\n', NULL)) ++ return -EINVAL; ++ } else if (strnchr(buf, count, '.')) { ++ kr.family = AF_INET; ++ if (!in4_pton(buf, count, (void *)&kr.addr, '\n', NULL)) ++ return -EINVAL; ++ } ++ ++ nf_ct_iterate_cleanup_net(net, kill_matching, &kr, 0, 0); ++ ++ return 0; ++} ++ + static const struct seq_operations ct_cpu_seq_ops = { + .start = ct_cpu_seq_start, + .next = ct_cpu_seq_next, +@@ -469,8 +520,9 @@ static int nf_conntrack_standalone_init_ + kuid_t root_uid; + kgid_t root_gid; + +- pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops, +- sizeof(struct ct_iter_state)); ++ pde = proc_create_net_data_write("nf_conntrack", 0440, net->proc_net, ++ &ct_seq_ops, &ct_file_write, ++ sizeof(struct ct_iter_state), NULL); + if (!pde) + goto out_nf_conntrack; + |