diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0060-netfilter-add-support-for-flushing-conntrack-via-pro.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0060-netfilter-add-support-for-flushing-conntrack-via-pro.patch | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/nixos/modules/kernel-patches/0060-netfilter-add-support-for-flushing-conntrack-via-pro.patch b/nixos/modules/kernel-patches/0060-netfilter-add-support-for-flushing-conntrack-via-pro.patch new file mode 100644 index 0000000..76e1590 --- /dev/null +++ b/nixos/modules/kernel-patches/0060-netfilter-add-support-for-flushing-conntrack-via-pro.patch @@ -0,0 +1,95 @@ +From ec5167f51145842fe3aee19df68dc0fcebcd54e7 Mon Sep 17 00:00:00 2001 +From: Felix Fietkau <nbd@nbd.name> +Date: Tue, 27 Sep 2022 16:22:04 +0200 +Subject: [PATCH 60/96] 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 | 56 ++++++++++++++++++++++++- + 1 file changed, 54 insertions(+), 2 deletions(-) + +diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c +index 05895878610c..8d3be4cc340e 100644 +--- 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> +@@ -465,6 +466,56 @@ static int ct_cpu_seq_show(struct seq_file *seq, void *v) + 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, +@@ -478,8 +529,9 @@ static int nf_conntrack_standalone_init_proc(struct net *net) + 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; + +-- +2.37.2 + |