diff options
Diffstat (limited to 'net/mptcp/options.c')
| -rw-r--r-- | net/mptcp/options.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index ae69059583a7..2e2551590ecd 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -71,11 +71,9 @@ static void mptcp_parse_option(const struct sk_buff *skb, * "If a checksum is not present when its use has been * negotiated, the receiver MUST close the subflow with a RST as * it is considered broken." - * - * We don't implement DSS checksum - fall back to TCP. */ if (flags & MPTCP_CAP_CHECKSUM_REQD) - break; + mp_opt->csum_reqd = 1; mp_opt->mp_capable = 1; if (opsize >= TCPOLEN_MPTCP_MPC_SYNACK) { @@ -327,6 +325,8 @@ void mptcp_get_options(const struct sock *sk, const struct sk_buff *skb, struct mptcp_options_received *mp_opt) { + struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); + struct mptcp_sock *msk = mptcp_sk(subflow->conn); const struct tcphdr *th = tcp_hdr(skb); const unsigned char *ptr; int length; @@ -342,6 +342,7 @@ void mptcp_get_options(const struct sock *sk, mp_opt->dss = 0; mp_opt->mp_prio = 0; mp_opt->reset = 0; + mp_opt->csum_reqd = READ_ONCE(msk->csum_enabled); length = (th->doff * 4) - sizeof(struct tcphdr); ptr = (const unsigned char *)(th + 1); |