Test a fix from MPTCP ML and update README

README.md

@@ -76,9 +76,7 @@ OMR_TARGET="rpi3" ./build.sh
 
 Our solution is mainly based on:
 
-* [OverTheBox](https://www.ovhtelecom.fr/overthebox/)
 * [OpenWRT](https://openwrt.org)
-* [LEDE](https://lede-project.org)
 * [MultiPath TCP (MPTCP)](https://multipath-tcp.org)
 * [Shadowsocks](https://shadowsocks.org)
 * [Glorytun](https://github.com/angt/glorytun)

root/target/linux/generic/hack-4.19/692-mptcp-fix.patch

@@ -0,0 +1,21 @@
+diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
+index 480373c960cd..bae7231096cf 100644
+--- a/net/ipv4/tcp_input.c
++++ b/net/ipv4/tcp_input.c
+@@ -5227,6 +5227,8 @@ static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible)
+ {
+ 	struct tcp_sock *tp = tcp_sk(sk);
+ 	unsigned long rtt, delay;
++	struct sock *meta_sk = mptcp(tp) ? mptcp_meta_sk(sk) : sk;
++	struct tcp_sock *meta_tp = tcp_sk(meta_sk);
+ 
+ 	/* More than one full frame received... */
+ 	if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss &
+@@ -5268,6 +5268,6 @@
+ 	      * we have not received enough bytes to satisfy the condition.
+ 	      */
+-	    (tp->rcv_nxt - tp->copied_seq < sk->sk_rcvlowat ||
++	    (meta_tp->rcv_nxt - meta_tp->copied_seq < meta_sk->sk_rcvlowat ||
+ 	     tp->ops->__select_window(sk) >= tp->rcv_wnd)) ||
+ 	    /* We ACK each frame or... */
+ 	    tcp_in_quickack_mode(sk) ||