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// SPDX-License-Identifier: BSD-3-Clause
/**
* @file lib/path_manager.c
*
* @brief mptcpd generic netlink commands.
*
* Copyright (c) 2017-2022, Intel Corporation
*/
#ifdef HAVE_CONFIG_H
# include <mptcpd/private/config.h>
#endif
#include <assert.h>
#include <errno.h>
#include <netinet/in.h>
#include <ell/ell.h>
#include <mptcpd/path_manager.h>
#include <mptcpd/private/path_manager.h>
#include <mptcpd/plugin.h>
#include <mptcpd/private/netlink_pm.h>
// -------------------------------------------------------------------
static bool is_pm_ready(struct mptcpd_pm const *pm, char const *fname)
{
bool const ready = mptcpd_pm_ready(pm);
if (!ready)
l_warn("%s: MPTCP family is not yet available",
fname);
return ready;
}
// --------------------------------------------------------------------
bool mptcpd_pm_register_ops(struct mptcpd_pm *pm,
struct mptcpd_pm_ops const *ops,
void *user_data)
{
if (pm == NULL || ops == NULL)
return false;
if (ops->ready == NULL
&& ops->not_ready == NULL) {
l_error("No path manager event tracking "
"ops were set.");
return false;
}
struct pm_ops_info *const info = l_malloc(sizeof(*info));
info->ops = ops;
info->user_data = user_data;
bool const registered = l_queue_push_tail(pm->event_ops, info);
if (!registered)
l_free(info);
return registered;
}
bool mptcpd_pm_ready(struct mptcpd_pm const *pm)
{
return pm->family != NULL;
}
// -------------------------------------------------------------------
int mptcpd_kpm_add_addr(struct mptcpd_pm *pm,
struct sockaddr const *addr,
mptcpd_aid_t address_id,
mptcpd_flags_t flags,
int index)
{
if (pm == NULL || addr == NULL || address_id == 0)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->add_addr == NULL)
return ENOTSUP;
return ops->add_addr(pm,
addr,
address_id,
flags,
index);
}
int mptcpd_kpm_remove_addr(struct mptcpd_pm *pm, mptcpd_aid_t address_id)
{
if (pm == NULL || address_id == 0)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->remove_addr == NULL)
return ENOTSUP;
return ops->remove_addr(pm, address_id);
}
int mptcpd_kpm_get_addr(struct mptcpd_pm *pm,
mptcpd_aid_t id,
mptcpd_kpm_get_addr_cb_t callback,
void *data,
mptcpd_complete_func_t complete)
{
if (pm == NULL || id == 0 || callback == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->get_addr == NULL)
return ENOTSUP;
return ops->get_addr(pm, id, callback, data, complete);
}
int mptcpd_kpm_dump_addrs(struct mptcpd_pm *pm,
mptcpd_kpm_get_addr_cb_t callback,
void *data,
mptcpd_complete_func_t complete)
{
if (pm == NULL || callback == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->dump_addrs == NULL)
return ENOTSUP;
return ops->dump_addrs(pm, callback, data, complete);
}
int mptcpd_kpm_flush_addrs(struct mptcpd_pm *pm)
{
if (pm == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->flush_addrs == NULL)
return ENOTSUP;
return ops->flush_addrs(pm);
}
int mptcpd_kpm_set_limits(struct mptcpd_pm *pm,
struct mptcpd_limit const *limits,
size_t len)
{
if (pm == NULL || limits == NULL || len == 0)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->set_limits == NULL)
return ENOTSUP;
return ops->set_limits(pm, limits, len);
}
int mptcpd_kpm_get_limits(struct mptcpd_pm *pm,
mptcpd_pm_get_limits_cb callback,
void *data)
{
if (pm == NULL || callback == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->get_limits == NULL)
return ENOTSUP;
return ops->get_limits(pm, callback, data);
}
int mptcpd_kpm_set_flags(struct mptcpd_pm *pm,
struct sockaddr const *addr,
mptcpd_flags_t flags)
{
if (pm == NULL || addr == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_kpm_cmd_ops const *const ops =
pm->netlink_pm->kcmd_ops;
if (ops == NULL || ops->set_flags == NULL)
return ENOTSUP;
return ops->set_flags(pm, addr, flags);
}
// -------------------------------------------------------------------
static int do_pm_add_addr(struct mptcpd_pm *pm,
struct sockaddr *addr,
mptcpd_aid_t address_id,
mptcpd_token_t token,
bool listener)
{
if (pm == NULL || addr == NULL || address_id == 0)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_pm_cmd_ops const *const ops =
pm->netlink_pm->cmd_ops;
if (ops == NULL || ops->add_addr == NULL)
return ENOTSUP;
return ops->add_addr(pm,
addr,
address_id,
token,
listener);
}
int mptcpd_pm_add_addr(struct mptcpd_pm *pm,
struct sockaddr *addr,
mptcpd_aid_t address_id,
mptcpd_token_t token)
{
return do_pm_add_addr(pm, addr, address_id, token, true);
}
int mptcpd_pm_add_addr_no_listener(struct mptcpd_pm *pm,
struct sockaddr *addr,
mptcpd_aid_t address_id,
mptcpd_token_t token)
{
return do_pm_add_addr(pm, addr, address_id, token, false);
}
int mptcpd_pm_remove_addr(struct mptcpd_pm *pm,
struct sockaddr const *addr,
mptcpd_aid_t address_id,
mptcpd_token_t token)
{
if (pm == NULL || address_id == 0)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_pm_cmd_ops const *const ops =
pm->netlink_pm->cmd_ops;
if (ops == NULL || ops->remove_addr == NULL)
return ENOTSUP;
return ops->remove_addr(pm, addr, address_id, token);
}
int mptcpd_pm_add_subflow(struct mptcpd_pm *pm,
mptcpd_token_t token,
mptcpd_aid_t local_address_id,
mptcpd_aid_t remote_address_id,
struct sockaddr const *local_addr,
struct sockaddr const *remote_addr,
bool backup)
{
if (pm == NULL || remote_addr == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_pm_cmd_ops const *const ops =
pm->netlink_pm->cmd_ops;
if (ops == NULL || ops->add_subflow == NULL)
return ENOTSUP;
return ops->add_subflow(pm,
token,
local_address_id,
remote_address_id,
local_addr,
remote_addr,
backup);
}
int mptcpd_pm_set_backup(struct mptcpd_pm *pm,
mptcpd_token_t token,
struct sockaddr const *local_addr,
struct sockaddr const *remote_addr,
bool backup)
{
if (pm == NULL || local_addr == NULL || remote_addr == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_pm_cmd_ops const *const ops =
pm->netlink_pm->cmd_ops;
if (ops == NULL || ops->set_backup == NULL)
return ENOTSUP;
return ops->set_backup(pm,
token,
local_addr,
remote_addr,
backup);
}
int mptcpd_pm_remove_subflow(struct mptcpd_pm *pm,
mptcpd_token_t token,
struct sockaddr const *local_addr,
struct sockaddr const *remote_addr)
{
if (pm == NULL || local_addr == NULL || remote_addr == NULL)
return EINVAL;
if (!is_pm_ready(pm, __func__))
return EAGAIN;
struct mptcpd_pm_cmd_ops const *const ops =
pm->netlink_pm->cmd_ops;
if (ops == NULL || ops->remove_subflow == NULL)
return ENOTSUP;
return ops->remove_subflow(pm,
token,
local_addr,
remote_addr);
}
// -------------------------------------------------------------------
struct mptcpd_nm const * mptcpd_pm_get_nm(struct mptcpd_pm const *pm)
{
return pm->nm;
}
struct mptcpd_idm * mptcpd_pm_get_idm(struct mptcpd_pm const *pm)
{
return pm->idm;
}
struct mptcpd_lm * mptcpd_pm_get_lm(struct mptcpd_pm const *pm)
{
return pm->lm;
}
/*
Local Variables:
c-file-style: "linux"
End:
*/
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