diff options
Diffstat (limited to 'target/linux/generic/pending-4.19/613-netfilter_optional_tcp_window_check.patch')
| -rw-r--r-- | target/linux/generic/pending-4.19/613-netfilter_optional_tcp_window_check.patch | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/target/linux/generic/pending-4.19/613-netfilter_optional_tcp_window_check.patch b/target/linux/generic/pending-4.19/613-netfilter_optional_tcp_window_check.patch deleted file mode 100644 index 634218dfc3..0000000000 --- a/target/linux/generic/pending-4.19/613-netfilter_optional_tcp_window_check.patch +++ /dev/null @@ -1,53 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Subject: netfilter: optional tcp window check - -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - net/netfilter/nf_conntrack_proto_tcp.c | 13 +++++++++++++ - 1 file changed, 13 insertions(+) - ---- a/net/netfilter/nf_conntrack_proto_tcp.c -+++ b/net/netfilter/nf_conntrack_proto_tcp.c -@@ -34,6 +34,9 @@ - #include <net/netfilter/ipv4/nf_conntrack_ipv4.h> - #include <net/netfilter/ipv6/nf_conntrack_ipv6.h> - -+/* Do not check the TCP window for incoming packets */ -+static int nf_ct_tcp_no_window_check __read_mostly = 1; -+ - /* "Be conservative in what you do, - be liberal in what you accept from others." - If it's non-zero, we mark only out of window RST segments as INVALID. */ -@@ -484,6 +487,9 @@ static bool tcp_in_window(const struct n - s32 receiver_offset; - bool res, in_recv_win; - -+ if (nf_ct_tcp_no_window_check) -+ return true; -+ - /* - * Get the required data from the packet. - */ -@@ -1059,7 +1065,7 @@ static int tcp_packet(struct nf_conn *ct - IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED && - timeouts[new_state] > timeouts[TCP_CONNTRACK_UNACK]) - timeout = timeouts[TCP_CONNTRACK_UNACK]; -- else if (ct->proto.tcp.last_win == 0 && -+ else if (!nf_ct_tcp_no_window_check && ct->proto.tcp.last_win == 0 && - timeouts[new_state] > timeouts[TCP_CONNTRACK_RETRANS]) - timeout = timeouts[TCP_CONNTRACK_RETRANS]; - else -@@ -1508,6 +1514,13 @@ static struct ctl_table tcp_sysctl_table - .mode = 0644, - .proc_handler = proc_dointvec, - }, -+ { -+ .procname = "nf_conntrack_tcp_no_window_check", -+ .data = &nf_ct_tcp_no_window_check, -+ .maxlen = sizeof(unsigned int), -+ .mode = 0644, -+ .proc_handler = proc_dointvec, -+ }, - { } - }; - #endif /* CONFIG_SYSCTL */ |