diff options
| author | Geliang Tang <geliangtang@xiaomi.com> | 2021-08-25 02:26:16 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-08-25 13:02:34 +0300 |
| commit | 5580d41b758af12134d5c6b4c385fc25d0c6bfb0 (patch) | |
| tree | 65118b49118bf677e80f987cf0d03ca3e9fab994 /net/mptcp/options.c | |
| parent | c25aeb4e095355eec3beb6a2b2b30322bd6d0dd4 (diff) | |
| download | linux-5580d41b758af12134d5c6b4c385fc25d0c6bfb0.tar.xz | |
mptcp: MP_FAIL suboption receiving
This patch added handling for receiving MP_FAIL suboption.
Add a new members mp_fail and fail_seq in struct mptcp_options_received.
When MP_FAIL suboption is received, set mp_fail to 1 and save the sequence
number to fail_seq.
Then invoke mptcp_pm_mp_fail_received to deal with the MP_FAIL suboption.
Signed-off-by: Geliang Tang <geliangtang@xiaomi.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 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index f2ebdd55d3cc..fa287a49dc84 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -336,6 +336,16 @@ static void mptcp_parse_option(const struct sk_buff *skb, mp_opt->reset_reason = *ptr; break; + case MPTCPOPT_MP_FAIL: + if (opsize != TCPOLEN_MPTCP_FAIL) + break; + + ptr += 2; + mp_opt->mp_fail = 1; + mp_opt->fail_seq = get_unaligned_be64(ptr); + pr_debug("MP_FAIL: data_seq=%llu", mp_opt->fail_seq); + break; + default: break; } @@ -364,6 +374,7 @@ void mptcp_get_options(const struct sock *sk, mp_opt->reset = 0; mp_opt->csum_reqd = READ_ONCE(msk->csum_enabled); mp_opt->deny_join_id0 = 0; + mp_opt->mp_fail = 0; length = (th->doff * 4) - sizeof(struct tcphdr); ptr = (const unsigned char *)(th + 1); @@ -1145,6 +1156,11 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) mp_opt.mp_prio = 0; } + if (mp_opt.mp_fail) { + mptcp_pm_mp_fail_received(sk, mp_opt.fail_seq); + mp_opt.mp_fail = 0; + } + if (mp_opt.reset) { subflow->reset_seen = 1; subflow->reset_reason = mp_opt.reset_reason; |