1b1c7a0ef7
Add enough of a path manager interface to allow sending of ADD_ADDR when an incoming MPTCP connection is created. Capable of sending only a single IPv4 ADD_ADDR option. The 'pm_data' element of the connection sock will need to be expanded to handle multiple interfaces and IPv6. Partial processing of the incoming ADD_ADDR is included so the path manager notification of that event happens at the proper time, which involves validating the incoming address information. This is a skeleton interface definition for events generated by MPTCP. Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Co-developed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Multipath TCP
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*
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* Copyright (c) 2019, Intel Corporation.
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*/
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#include <linux/kernel.h>
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#include <net/tcp.h>
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#include <net/mptcp.h>
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#include "protocol.h"
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static struct workqueue_struct *pm_wq;
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/* path manager command handlers */
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int mptcp_pm_announce_addr(struct mptcp_sock *msk,
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const struct mptcp_addr_info *addr)
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{
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return -ENOTSUPP;
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}
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int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id)
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{
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return -ENOTSUPP;
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}
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int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 remote_id)
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{
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return -ENOTSUPP;
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}
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/* path manager event handlers */
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void mptcp_pm_new_connection(struct mptcp_sock *msk, int server_side)
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{
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struct mptcp_pm_data *pm = &msk->pm;
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pr_debug("msk=%p, token=%u side=%d", msk, msk->token, server_side);
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WRITE_ONCE(pm->server_side, server_side);
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}
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bool mptcp_pm_allow_new_subflow(struct mptcp_sock *msk)
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{
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pr_debug("msk=%p", msk);
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return false;
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}
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void mptcp_pm_fully_established(struct mptcp_sock *msk)
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{
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pr_debug("msk=%p", msk);
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}
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void mptcp_pm_connection_closed(struct mptcp_sock *msk)
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{
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pr_debug("msk=%p", msk);
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}
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void mptcp_pm_subflow_established(struct mptcp_sock *msk,
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struct mptcp_subflow_context *subflow)
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{
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pr_debug("msk=%p", msk);
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}
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void mptcp_pm_subflow_closed(struct mptcp_sock *msk, u8 id)
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{
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pr_debug("msk=%p", msk);
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}
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void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
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const struct mptcp_addr_info *addr)
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{
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pr_debug("msk=%p, remote_id=%d", msk, addr->id);
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}
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/* path manager helpers */
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bool mptcp_pm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
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struct mptcp_addr_info *saddr)
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{
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return false;
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}
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int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
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{
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return 0;
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}
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static void pm_worker(struct work_struct *work)
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{
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}
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void mptcp_pm_data_init(struct mptcp_sock *msk)
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{
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msk->pm.add_addr_signaled = 0;
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msk->pm.add_addr_accepted = 0;
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msk->pm.local_addr_used = 0;
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msk->pm.subflows = 0;
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WRITE_ONCE(msk->pm.work_pending, false);
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WRITE_ONCE(msk->pm.addr_signal, false);
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WRITE_ONCE(msk->pm.accept_addr, false);
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WRITE_ONCE(msk->pm.accept_subflow, false);
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msk->pm.status = 0;
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spin_lock_init(&msk->pm.lock);
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INIT_WORK(&msk->pm.work, pm_worker);
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}
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void mptcp_pm_init(void)
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{
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pm_wq = alloc_workqueue("pm_wq", WQ_UNBOUND | WQ_MEM_RECLAIM, 8);
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if (!pm_wq)
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panic("Failed to allocate workqueue");
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}
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