@@ -636,6 +636,7 @@ static unsigned int fill_local_addresses_vec(struct mptcp_sock *msk,
{
struct sock *sk = (struct sock *)msk;
struct mptcp_pm_addr_entry *entry;
+ struct mptcp_addr_info mpc_addr;
struct pm_nl_pernet *pernet;
unsigned int subflows_max;
int i = 0;
@@ -643,6 +644,9 @@ static unsigned int fill_local_addresses_vec(struct mptcp_sock *msk,
pernet = pm_nl_get_pernet_from_msk(msk);
subflows_max = mptcp_pm_get_subflows_max(msk);
+ if (msk->first)
+ mptcp_local_address((struct sock_common *)msk->first, &mpc_addr);
+
rcu_read_lock();
list_for_each_entry_rcu(entry, &pernet->local_addr_list, list) {
if (!(entry->flags & MPTCP_PM_ADDR_FLAG_FULLMESH))
@@ -653,7 +657,14 @@ static unsigned int fill_local_addresses_vec(struct mptcp_sock *msk,
if (msk->pm.subflows < subflows_max) {
msk->pm.subflows++;
- addrs[i++] = entry->addr;
+ addrs[i] = entry->addr;
+
+ /* Special case for ID0: set the correct ID */
+ if (msk->first &&
+ mptcp_addresses_equal(&entry->addr, &mpc_addr, entry->addr.port))
+ addrs[i].id = 0;
+
+ i++;
}
}
rcu_read_unlock();
When reacting upon the reception of an ADD_ADDR, the in-kernel PM first looks for fullmesh endpoints. If there are some, it will pick them, using their entry ID. It should set the ID 0 when using the endpoint corresponding to the initial subflow, it is a special case imposed by the MPTCP specs. Note that msk->mpc_endpoint_id might not be set when receiving the first ADD_ADDR from the server. So better to compare the addresses. Fixes: 1a0d6136c5f0 ("mptcp: local addresses fullmesh") Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> --- Notes: - v4: - Check that msk->first is not NULL. --- net/mptcp/pm_netlink.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)