diff options
| author | Geliang Tang <geliangtang@gmail.com> | 2021-06-17 16:46:09 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-18 11:40:11 -0700 |
| commit | 06fe1719aa501e3b574b1b2b3a7ad2ddac5fb9cb (patch) | |
| tree | b43f7d441f4d1cac1c2209f57f967655d3d04eb7 /net/mptcp/options.c | |
| parent | d0cc298745f5abb3c43319cb9485daf3471d6f94 (diff) | |
mptcp: add csum_reqd in mptcp_out_options
This patch added a new member csum_reqd in struct mptcp_out_options and
struct mptcp_subflow_request_sock. Initialized it with the helper
function mptcp_is_checksum_enabled().
In mptcp_write_options, if this field is enabled, send out the MP_CAPABLE
suboption with the MPTCP_CAP_CHECKSUM_REQD flag.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp/options.c')
| -rw-r--r-- | net/mptcp/options.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index 6b825fb3fa83..bb3a1f3b6e99 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -380,6 +380,7 @@ bool mptcp_syn_options(struct sock *sk, const struct sk_buff *skb, subflow->snd_isn = TCP_SKB_CB(skb)->end_seq; if (subflow->request_mptcp) { opts->suboptions = OPTION_MPTCP_MPC_SYN; + opts->csum_reqd = mptcp_is_checksum_enabled(sock_net(sk)); *size = TCPOLEN_MPTCP_MPC_SYN; return true; } else if (subflow->request_join) { @@ -435,6 +436,7 @@ static bool mptcp_established_options_mp(struct sock *sk, struct sk_buff *skb, struct mptcp_out_options *opts) { struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); + struct mptcp_sock *msk = mptcp_sk(subflow->conn); struct mptcp_ext *mpext; unsigned int data_len; @@ -465,6 +467,7 @@ static bool mptcp_established_options_mp(struct sock *sk, struct sk_buff *skb, opts->suboptions = OPTION_MPTCP_MPC_ACK; opts->sndr_key = subflow->local_key; opts->rcvr_key = subflow->remote_key; + opts->csum_reqd = READ_ONCE(msk->csum_enabled); /* Section 3.1. * The MP_CAPABLE option is carried on the SYN, SYN/ACK, and ACK @@ -789,6 +792,7 @@ bool mptcp_synack_options(const struct request_sock *req, unsigned int *size, if (subflow_req->mp_capable) { opts->suboptions = OPTION_MPTCP_MPC_SYNACK; opts->sndr_key = subflow_req->local_key; + opts->csum_reqd = subflow_req->csum_reqd; *size = TCPOLEN_MPTCP_MPC_SYNACK; pr_debug("subflow_req=%p, local_key=%llu", subflow_req, subflow_req->local_key); @@ -1123,7 +1127,7 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp, { if ((OPTION_MPTCP_MPC_SYN | OPTION_MPTCP_MPC_SYNACK | OPTION_MPTCP_MPC_ACK) & opts->suboptions) { - u8 len; + u8 len, flag = MPTCP_CAP_HMAC_SHA256; if (OPTION_MPTCP_MPC_SYN & opts->suboptions) len = TCPOLEN_MPTCP_MPC_SYN; @@ -1134,9 +1138,12 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp, else len = TCPOLEN_MPTCP_MPC_ACK; + if (opts->csum_reqd) + flag |= MPTCP_CAP_CHECKSUM_REQD; + *ptr++ = mptcp_option(MPTCPOPT_MP_CAPABLE, len, MPTCP_SUPPORTED_VERSION, - MPTCP_CAP_HMAC_SHA256); + flag); if (!((OPTION_MPTCP_MPC_SYNACK | OPTION_MPTCP_MPC_ACK) & opts->suboptions)) |