diff options
Diffstat (limited to 'net/mptcp/pm.c')
| -rw-r--r-- | net/mptcp/pm.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index 92d540e527a2..300fa9bea047 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -415,7 +415,23 @@ out_unlock: int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc) { - return mptcp_pm_nl_get_local_id(msk, skc); + struct mptcp_addr_info skc_local; + struct mptcp_addr_info msk_local; + + if (WARN_ON_ONCE(!msk)) + return -1; + + /* The 0 ID mapping is defined by the first subflow, copied into the msk + * addr + */ + mptcp_local_address((struct sock_common *)msk, &msk_local); + mptcp_local_address((struct sock_common *)skc, &skc_local); + if (mptcp_addresses_equal(&msk_local, &skc_local, false)) + return 0; + + if (mptcp_pm_is_userspace(msk)) + return mptcp_userspace_pm_get_local_id(msk, &skc_local); + return mptcp_pm_nl_get_local_id(msk, &skc_local); } void mptcp_pm_subflow_chk_stale(const struct mptcp_sock *msk, struct sock *ssk) |