/
netlink_pm_upstream.c
1164 lines (977 loc) 路 37 KB
/
netlink_pm_upstream.c
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// SPDX-License-Identifier: BSD-3-Clause
/**
* @file netlink_pm_upstream.c
*
* @brief Upstream kernel generic netlink path manager details.
*
* Copyright (c) 2020-2022, Intel Corporation
*/
#ifdef HAVE_CONFIG_H
# include <mptcpd/private/config.h>
#endif
#include <assert.h>
#include <errno.h>
#include <sys/socket.h>
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
#include <ell/genl.h>
#include <ell/util.h> // For L_STRINGIFY needed by l_error(), etc.
#include <ell/log.h>
#pragma GCC diagnostic pop
#include <mptcpd/types.h>
#include <mptcpd/listener_manager.h>
#include <mptcpd/path_manager.h>
#include <mptcpd/private/netlink_pm.h>
#include <mptcpd/private/path_manager.h>
#include <mptcpd/private/addr_info.h>
#include <mptcpd/private/sockaddr.h>
#include <mptcpd/private/mptcp_upstream.h>
#include "commands.h"
#include "netlink_pm.h"
#include "path_manager.h"
// Sanity check
#if MPTCPD_ADDR_FLAG_SIGNAL != MPTCP_PM_ADDR_FLAG_SIGNAL \
|| MPTCPD_ADDR_FLAG_SUBFLOW != MPTCP_PM_ADDR_FLAG_SUBFLOW \
|| MPTCPD_ADDR_FLAG_BACKUP != MPTCP_PM_ADDR_FLAG_BACKUP \
|| MPTCPD_ADDR_FLAG_FULLMESH != MPTCP_PM_ADDR_FLAG_FULLMESH
# error Mismatch between mptcpd and upstream kernel addr flags.
#endif
// --------------------------------------------------------------
// Common Utility Functions
// --------------------------------------------------------------
struct addr_info
{
struct sockaddr const *const addr;
mptcpd_aid_t id;
uint32_t flags;
int32_t ifindex;
};
static bool append_ip(struct l_genl_msg *msg, struct addr_info *info)
{
struct sockaddr const *const addr = info->addr;
assert(mptcpd_is_inet_family(addr));
uint16_t type = 0;
uint16_t len = 0;
void const *data = NULL;
if (addr->sa_family == AF_INET) {
type = MPTCP_PM_ADDR_ATTR_ADDR4;
struct sockaddr_in const *const addr4 =
(struct sockaddr_in *) addr;
data = &addr4->sin_addr;
len = sizeof(addr4->sin_addr);
} else {
type = MPTCP_PM_ADDR_ATTR_ADDR6;
struct sockaddr_in6 const *const addr6 =
(struct sockaddr_in6 *) addr;
data = &addr6->sin6_addr;
len = sizeof(addr6->sin6_addr);
}
return l_genl_msg_append_attr(msg, type, len, data);
}
static bool append_addr_attr(struct l_genl_msg *msg,
struct addr_info *info,
uint16_t nested_type)
{
assert(nested_type == MPTCP_PM_ATTR_ADDR
|| nested_type == MPTCP_PM_ATTR_ADDR_REMOTE);
// Types chosen to match MPTCP genl API.
uint16_t const family = mptcpd_get_addr_family(info->addr);
uint16_t const port = mptcpd_get_port_number(info->addr);
return l_genl_msg_enter_nested(msg,
NLA_F_NESTED | nested_type)
&& l_genl_msg_append_attr(
msg,
MPTCP_PM_ADDR_ATTR_FAMILY,
sizeof(family), // sizeof(uint16_t)
&family)
&& append_ip(msg, info)
&& (port == 0 ||
l_genl_msg_append_attr(msg,
MPTCP_PM_ADDR_ATTR_PORT,
sizeof(port), // sizeof(uint16_t)
&port))
&& (info->id == 0
|| l_genl_msg_append_attr(
msg,
MPTCP_PM_ADDR_ATTR_ID,
sizeof(info->id), // sizeof(uint8_t)
&info->id))
&& (info->flags == 0
|| l_genl_msg_append_attr(
msg,
MPTCP_PM_ADDR_ATTR_FLAGS,
sizeof(info->flags), // sizeof(uint32_t)
&info->flags))
&& (info->ifindex == 0
|| l_genl_msg_append_attr(
msg,
MPTCP_PM_ADDR_ATTR_IF_IDX,
sizeof(info->ifindex), // sizeof(int32_t)
&info->ifindex))
&& l_genl_msg_leave_nested(msg);
}
static bool append_local_addr_attr(struct l_genl_msg *msg,
struct addr_info *info)
{
static uint16_t const nested_type = MPTCP_PM_ATTR_ADDR;
return append_addr_attr(msg, info, nested_type);
}
static bool append_remote_addr_attr(struct l_genl_msg *msg,
struct addr_info *info)
{
static uint16_t const nested_type = MPTCP_PM_ATTR_ADDR_REMOTE;
return append_addr_attr(msg, info, nested_type);
}
static int send_add_addr(struct mptcpd_pm *pm,
uint8_t cmd,
char const *cmd_name,
struct addr_info *info,
mptcpd_token_t token)
{
assert(cmd == MPTCP_PM_CMD_ANNOUNCE
|| cmd == MPTCP_PM_CMD_ADD_ADDR);
/*
Payload (nested):
(nested)
Local address family
Local address
Local port (optional)
Local address ID (optional)
Flags (optional)
Network interface index (optional)
Token (required for user space MPTCP_PM_CMD_ANNOUNCE)
*/
// Types chosen to match MPTCP genl API.
uint16_t const family = mptcpd_get_addr_family(info->addr);
uint16_t const port = mptcpd_get_port_number(info->addr);
/*
The MPTCP_PM_ADDR_FLAG_SIGNAL flag is required when a port
is specified. Make sure it is set.
*/
if (port != 0)
info->flags |= MPTCP_PM_ADDR_FLAG_SIGNAL;
size_t const payload_size =
MPTCPD_NLA_ALIGN(family)
+ MPTCPD_NLA_ALIGN_ADDR(info->addr)
+ MPTCPD_NLA_ALIGN_OPT(port)
+ MPTCPD_NLA_ALIGN_OPT(info->id)
+ MPTCPD_NLA_ALIGN_OPT(info->flags)
+ MPTCPD_NLA_ALIGN_OPT(info->ifindex)
+ MPTCPD_NLA_ALIGN_OPT(token);
struct l_genl_msg *const msg =
l_genl_msg_new_sized(cmd, payload_size);
bool const appended =
append_local_addr_attr(msg, info)
&& (token == 0
|| l_genl_msg_append_attr(
msg,
MPTCP_PM_ATTR_TOKEN,
sizeof(token), // sizeof(uint32_t)
&token));
if (!appended) {
l_genl_msg_unref(msg);
return ENOMEM;
}
return l_genl_family_send(pm->family,
msg,
mptcpd_family_send_callback,
(void *) cmd_name, /* user data */
NULL /* destroy */) == 0;
}
// --------------------------------------------------------------
// User Space Path Manager Related Functions
// --------------------------------------------------------------
static int upstream_announce(struct mptcpd_pm *pm,
struct sockaddr *addr,
mptcpd_aid_t id,
mptcpd_token_t token)
{
/**
* Set up MPTCP listening socket.
*
* @note An ephemeral port will be assigned to the port in
* @a addr if it is zero.
*
* @todo This should be optional.
*/
int const r = mptcpd_lm_listen(pm->lm, addr);
if (r != 0)
return r;
/**
* @todo Add support for the optional network interface index
* attribute.
*/
struct addr_info info = {
.addr = addr,
.id = id,
.flags = MPTCP_PM_ADDR_FLAG_SIGNAL,
// .ifindex = ...
};
return send_add_addr(pm,
MPTCP_PM_CMD_ANNOUNCE,
"announce",
&info,
token);
}
struct remove_info
{
struct mptcpd_lm *const lm;
struct sockaddr const *const sa;
};
static void upstream_remove_callback(struct l_genl_msg *msg, void *user_data)
{
static char const op[] = "remove_addr";
mptcpd_family_send_callback(msg, (void *) op);
/**
* @todo The above @c mptcpd_family_send_callback() function
* also calls @c l_genl_msg_get_error(). We could
* refactor but that may not be worth the trouble since
* @c l_genl_msg_get_error() is not an expensive call.
*/
if (l_genl_msg_get_error(msg) == 0) {
struct remove_info *info = user_data;
/**
* Stop listening on MPTCP socket.
*
* @todo This should be optional.
*/
(void) mptcpd_lm_close(info->lm, info->sa);
}
}
static int upstream_remove(struct mptcpd_pm *pm,
struct sockaddr const *addr,
mptcpd_aid_t id,
mptcpd_token_t token)
{
/**
* @todo Refactor upstream_remove() and
* mptcp_org_remove_addr() functions. They only differ
* by command and attribute types, and callback
* function.
*/
/*
Payload:
Token
Local address ID
*/
size_t const payload_size =
MPTCPD_NLA_ALIGN(token)
+ MPTCPD_NLA_ALIGN(id);
struct l_genl_msg *const msg =
l_genl_msg_new_sized(MPTCP_PM_CMD_REMOVE, payload_size);
bool const appended =
l_genl_msg_append_attr(msg,
MPTCP_PM_ATTR_TOKEN,
sizeof(token),
&token)
&& l_genl_msg_append_attr(
msg,
MPTCP_PM_ATTR_LOC_ID,
sizeof(id),
&id);
if (!appended) {
l_genl_msg_unref(msg);
return ENOMEM;
}
struct remove_info info = { .lm = pm->lm, .sa = addr };
bool const result =
l_genl_family_send(pm->family,
msg,
upstream_remove_callback,
&info, /* user data */
NULL /* destroy */);
return result == 0;
}
static int upstream_add_subflow(struct mptcpd_pm *pm,
mptcpd_token_t token,
mptcpd_aid_t local_id,
mptcpd_aid_t remote_id,
struct sockaddr const *local_addr,
struct sockaddr const *remote_addr,
bool backup)
{
(void) backup;
/**
* @todo Flags, like @c MPTCP_PM_ADDR_FLAG_BACKUP are not
* parsed in the kernel when the user space creates a
* subflow. Should we call @c upstream_set_backup() if
* @a backup is @c true or just drop the @a backup
* parameter altogether?
*/
/*
Payload:
Token
(nested)
Local address ID
Local address family
Local address
Local port (optional, unused by kernel)
(nested)
Remote address ID
Remote address family
Remote address
Remote port
*/
/**
* @todo The local port isn't used. Should we explicitly set it
* to zero, or at least issue a diagnostic if it isn't zero?
*/
struct addr_info local = {
.addr = local_addr,
.id = local_id
};
struct addr_info remote = {
.addr = remote_addr,
.id = remote_id
};
uint16_t const local_port = mptcpd_get_port_number(local_addr);
size_t const payload_size =
MPTCPD_NLA_ALIGN(token)
+ MPTCPD_NLA_ALIGN(local_id)
+ MPTCPD_NLA_ALIGN(uint16_t) // local family
+ MPTCPD_NLA_ALIGN_ADDR(local_addr)
+ MPTCPD_NLA_ALIGN_OPT(local_port)
+ MPTCPD_NLA_ALIGN(remote_id)
+ MPTCPD_NLA_ALIGN(uint16_t) // remote family
+ MPTCPD_NLA_ALIGN_ADDR(remote_addr)
+ MPTCPD_NLA_ALIGN(uint16_t); // remote port
struct l_genl_msg *const msg =
l_genl_msg_new_sized(MPTCP_PM_CMD_SUBFLOW_CREATE,
payload_size);
bool const appended =
l_genl_msg_append_attr(
msg,
MPTCP_PM_ATTR_TOKEN,
sizeof(token), // sizeof(uint32_t)
&token)
&& append_local_addr_attr(msg, &local)
&& append_remote_addr_attr(msg, &remote);
if (!appended) {
l_genl_msg_unref(msg);
return ENOMEM;
}
return l_genl_family_send(pm->family,
msg,
mptcpd_family_send_callback,
"add_subflow", /* user data */
NULL /* destroy */) == 0;
}
static int upstream_remove_subflow(struct mptcpd_pm *pm,
mptcpd_token_t token,
struct sockaddr const *local_addr,
struct sockaddr const *remote_addr)
{
/*
Payload:
Token
(nested)
Local address family
Local address
Local port
(nested)
Remote address family
Remote address
Remote port
*/
struct addr_info local = {
.addr = local_addr,
};
struct addr_info remote = {
.addr = remote_addr,
};
size_t const payload_size =
MPTCPD_NLA_ALIGN(token)
+ MPTCPD_NLA_ALIGN(uint16_t) // local family
+ MPTCPD_NLA_ALIGN_ADDR(local_addr)
+ MPTCPD_NLA_ALIGN(uint16_t) // local port
+ MPTCPD_NLA_ALIGN(uint16_t) // remote family
+ MPTCPD_NLA_ALIGN_ADDR(remote_addr)
+ MPTCPD_NLA_ALIGN(uint16_t); // remote port
struct l_genl_msg *const msg =
l_genl_msg_new_sized(MPTCP_PM_CMD_SUBFLOW_DESTROY,
payload_size);
bool const appended =
l_genl_msg_append_attr(
msg,
MPTCP_PM_ATTR_TOKEN,
sizeof(token), // sizeof(uint32_t)
&token)
&& append_local_addr_attr(msg, &local)
&& append_remote_addr_attr(msg, &remote);
if (!appended) {
l_genl_msg_unref(msg);
return ENOMEM;
}
return l_genl_family_send(pm->family,
msg,
mptcpd_family_send_callback,
"remove_subflow", /* user data */
NULL /* destroy */) == 0;
}
static int upstream_set_backup(struct mptcpd_pm *pm,
mptcpd_token_t token,
struct sockaddr const *local_addr,
struct sockaddr const *remote_addr,
bool backup)
{
/*
Payload:
Token
(nested)
Local address family
Local address
Local port
Local flags (backup)
(nested)
Remote address family
Remote address
Remote port
*/
struct addr_info local = {
.addr = local_addr,
.flags = (backup ? MPTCP_PM_ADDR_FLAG_BACKUP : 0)
};
struct addr_info remote = {
.addr = remote_addr,
};
size_t const payload_size =
MPTCPD_NLA_ALIGN(token)
+ MPTCPD_NLA_ALIGN(uint16_t) // local family
+ MPTCPD_NLA_ALIGN_ADDR(local_addr)
+ MPTCPD_NLA_ALIGN(uint16_t) // local port
+ MPTCPD_NLA_ALIGN(local.flags)
+ MPTCPD_NLA_ALIGN(uint16_t) // remote family
+ MPTCPD_NLA_ALIGN_ADDR(remote_addr)
+ MPTCPD_NLA_ALIGN(uint16_t); // remote port
struct l_genl_msg *const msg =
l_genl_msg_new_sized(MPTCP_PM_CMD_SET_FLAGS,
payload_size);
bool const appended =
l_genl_msg_append_attr(
msg,
MPTCP_PM_ATTR_TOKEN,
sizeof(token), // sizeof(uint32_t)
&token)
&& append_local_addr_attr(msg, &local)
&& append_remote_addr_attr(msg, &remote);
if (!appended) {
l_genl_msg_unref(msg);
return ENOMEM;
}
return l_genl_family_send(pm->family,
msg,
mptcpd_family_send_callback,
"set_backup", /* user data */
NULL /* destroy */) == 0;
}
// --------------------------------------------------------------
// Kernel Path Manager Related Functions
// --------------------------------------------------------------
/**
* @struct get_addr_user_callback
*
* @brief Convenience struct for passing addr to user callback.
*/
struct get_addr_user_callback
{
/// User supplied get_addr/dump_addrs callback.
mptcpd_kpm_get_addr_cb_t get_addr;
/// User data to be passed to one of the above callback.
void *data;
/**
* Function to be called upon completion of the
* get_addr/dump_addrs call. This function is called
* regardless of whether or not the get_addr/dump_addrs call
* asynchronously returns a network address. It is also only
* called once, whereas the above @c get_addr callback may be
* called multiple times during a @c dump_addrs call.
*/
mptcpd_complete_func_t complete;
/// Callback is for a dump_addrs call.
bool dump;
};
/**
* @struct get_limits_user_callback
*
* @brief Convenience struct for passing limits to user callback.
*/
struct get_limits_user_callback
{
/// User supplied callback.
mptcpd_pm_get_limits_cb get_limits;
/// User data to be passed to the above callback.
void *data;
};
// -----------------------------------------------------------------------
/**
* @brief Initialize a @c struct @c mptcpd_addr_info instance.
*
* Initialize a @c addr_info instance with the provided IPv4 or
* IPv6 address. Only one is required and used. The @a port, @a id,
* @a flags, and @a index are optional and may be set to @c NULL if
* not used.
*
* @param[in] addr4 IPv4 internet address (network byte order).
* @param[in] addr6 IPv6 internet address.
* @param[in] port TCP port (host byte order).
* @param[in] id Address ID.
* @param[in] flags MPTCP flags.
* @param[in] index Network interface index.
* @param[in,out] addr mptcpd network address information.
*
* @note This function is mostly meant for internal use.
*
* @return @c true on success. @c false otherwise.
*/
static bool mptcpd_addr_info_init(in_addr_t const *addr4,
struct in6_addr const *addr6,
in_port_t const *port,
uint8_t const *id,
uint32_t const *flags,
int32_t const *index,
struct mptcpd_addr_info *info)
{
if (info == NULL
|| !mptcpd_sockaddr_storage_init(addr4,
addr6,
port ? htons(*port) : 0,
&info->addr))
return false;
info->id = (id ? *id : 0);
info->flags = (flags ? *flags : 0);
info->index = (index ? *index : 0);
return true;
}
static bool get_addr_callback_recurse(struct l_genl_attr *attr,
struct mptcpd_addr_info *info)
{
struct l_genl_attr nested;
if (!l_genl_attr_recurse(attr, &nested)) {
l_error("get_addr: unable to obtain nested data");
return false;
}
uint16_t type;
uint16_t len;
void const *data = NULL;
in_addr_t const *addr4 = NULL;
struct in6_addr const *addr6 = NULL;
in_port_t const *port = NULL;
uint8_t const *id = NULL;
uint32_t const *flags = NULL;
int32_t const *index = NULL;
while (l_genl_attr_next(&nested, &type, &len, &data)) {
switch (type) {
case MPTCP_PM_ADDR_ATTR_FAMILY:
/*
Ignore. Deduced from addr attributes
below.
*/
break;
case MPTCP_PM_ADDR_ATTR_ID:
id = data;
break;
case MPTCP_PM_ADDR_ATTR_ADDR4:
// Sent from kernel in network byte order.
addr4 = data;
break;
case MPTCP_PM_ADDR_ATTR_ADDR6:
addr6 = data;
break;
case MPTCP_PM_ADDR_ATTR_PORT:
// Sent from kernel in host byte order.
port = data;
break;
case MPTCP_PM_ADDR_ATTR_FLAGS:
flags = data;
break;
case MPTCP_PM_ADDR_ATTR_IF_IDX:
index = data;
break;
default:
l_warn("Unknown MPTCP_PM_ATTR_ADDR attribute: %d",
type);
break;
}
}
mptcpd_addr_info_init(addr4, addr6, port, id, flags, index, info);
return true;
}
static void get_addr_callback(struct l_genl_msg *msg, void *user_data)
{
struct get_addr_user_callback const *const cb = user_data;
if (!mptcpd_check_genl_error(msg,
cb->dump
? "dump_addrs"
: "get_addr"))
return;
struct l_genl_attr attr;
if (!l_genl_attr_init(&attr, msg)) {
l_error("get_addr: "
"Unable to initialize genl attribute");
return;
}
/*
Payload (nested):
Network address
Address ID
Flags
Network interface index
*/
uint16_t type;
uint16_t len;
void const *data = NULL;
struct mptcpd_addr_info addr = { .id = 0 };
while (l_genl_attr_next(&attr, &type, &len, &data)) {
/*
Sanity check. The attribute sent by the kernel
should always be of type MPTCP_PM_ATTR_ADDR.
*/
if (type == MPTCP_PM_ATTR_ADDR) {
if (!get_addr_callback_recurse(&attr, &addr))
return;
// Only one addr is sent per get/dump.
break;
} else {
/*
This should only occur if the kernel
get_addr/dump_addrs API changed.
*/
l_error("%s: unexpected attribute of type %u",
cb->dump
? "dump_addrs"
: "get_addr",
type);
}
}
// Pass the results to the user.
cb->get_addr(&addr, cb->data);
}
static void get_addr_user_callback_free(void *data)
{
struct get_addr_user_callback *const cb = data;
if (cb->complete != NULL)
cb->complete(cb->data);
l_free(cb);
}
static uint16_t kernel_to_mptcpd_limit(uint16_t type)
{
// Translate from kernel to mptcpd MPTCP limit.
switch(type) {
case MPTCP_PM_ATTR_RCV_ADD_ADDRS:
return MPTCPD_LIMIT_RCV_ADD_ADDRS;
case MPTCP_PM_ATTR_SUBFLOWS:
return MPTCPD_LIMIT_SUBFLOWS;
default:
// Kernel sent an unknown MPTCP limit.
l_warn("Unrecognized MPTCP resource "
"limit type: %u.", type);
break;
}
return type;
}
static uint16_t mptcpd_to_kernel_limit(uint16_t type)
{
switch(type) {
case MPTCPD_LIMIT_RCV_ADD_ADDRS:
return MPTCP_PM_ATTR_RCV_ADD_ADDRS;
case MPTCPD_LIMIT_SUBFLOWS:
return MPTCP_PM_ATTR_SUBFLOWS;
default:
l_warn("Unrecognized MPTCP resource "
"limit type: %u.", type);
break;
}
return type;
}
static void get_limits_callback(struct l_genl_msg *msg, void *user_data)
{
struct get_limits_user_callback const *const cb = user_data;
struct mptcpd_limit *limits = NULL;
size_t limits_len = 0;
if (!mptcpd_check_genl_error(msg, "get_limits"))
goto get_limits_out;
struct l_genl_attr attr;
if (!l_genl_attr_init(&attr, msg)) {
l_error("get_limits: "
"Unable to initialize genl attribute");
goto get_limits_out;
}
/*
Payload:
MPTCP limit
*/
uint16_t type;
uint16_t len;
void const *data = NULL;
while (l_genl_attr_next(&attr, &type, &len, &data)) {
size_t const offset = limits_len++;
limits = l_realloc(limits,
sizeof(*limits) * limits_len);
struct mptcpd_limit *const l = limits + offset;
l->type = kernel_to_mptcpd_limit(type);
l->limit = *(uint32_t const *) data;
}
get_limits_out:
// Pass the results to the user.
cb->get_limits(limits, limits_len, cb->data);
l_free(limits);
}
static int upstream_add_addr(struct mptcpd_pm *pm,
struct sockaddr const *addr,
mptcpd_aid_t id,
uint32_t flags,
int index)
{
struct addr_info info = {
.addr = addr,
.id = id,
.flags = flags,
.ifindex = index
};
static uint32_t const token = 0; // Unused
return send_add_addr(pm,
MPTCP_PM_CMD_ADD_ADDR,
"add_addr",
&info,
token);
}
static int upstream_remove_addr(struct mptcpd_pm *pm,
mptcpd_aid_t address_id)
{
/*
Payload (nested):
Local address ID
*/
size_t const payload_size = MPTCPD_NLA_ALIGN(address_id);
struct l_genl_msg *const msg =
l_genl_msg_new_sized(MPTCP_PM_CMD_DEL_ADDR, payload_size);
bool const appended =
l_genl_msg_enter_nested(msg,
NLA_F_NESTED | MPTCP_PM_ATTR_ADDR)
&& l_genl_msg_append_attr(
msg,
MPTCP_PM_ADDR_ATTR_ID,
sizeof(address_id),
&address_id)
&& l_genl_msg_leave_nested(msg);
if (!appended) {
l_genl_msg_unref(msg);
return ENOMEM;
}
return l_genl_family_send(pm->family,
msg,
mptcpd_family_send_callback,
"remove_addr", /* user data */
NULL /* destroy */) == 0;
}
static int upstream_get_addr(struct mptcpd_pm *pm,
mptcpd_aid_t address_id,
mptcpd_kpm_get_addr_cb_t callback,
void *data,
mptcpd_complete_func_t complete)
{
/*
Payload (nested):
Local address ID
*/
size_t const payload_size = MPTCPD_NLA_ALIGN(address_id);
struct l_genl_msg *const msg =
l_genl_msg_new_sized(MPTCP_PM_CMD_GET_ADDR,
payload_size);
bool const appended =
l_genl_msg_enter_nested(msg,
NLA_F_NESTED | MPTCP_PM_ATTR_ADDR)
&& l_genl_msg_append_attr(
msg,
MPTCP_PM_ADDR_ATTR_ID,
sizeof(address_id),
&address_id)
&& l_genl_msg_leave_nested(msg);
if (!appended) {
l_genl_msg_unref(msg);
return ENOMEM;
}
struct get_addr_user_callback *const cb =
l_new(struct get_addr_user_callback, 1);
cb->get_addr = callback;
cb->data = data;
cb->complete = complete;
cb->dump = false;
return l_genl_family_send(
pm->family,
msg,
get_addr_callback,
cb, /* user data */
get_addr_user_callback_free /* destroy */) == 0;
}
static int upstream_dump_addrs(struct mptcpd_pm *pm,
mptcpd_kpm_get_addr_cb_t callback,
void *data,
mptcpd_complete_func_t complete)
{
/*
Payload:
NONE
*/
struct l_genl_msg *const msg =
l_genl_msg_new(MPTCP_PM_CMD_GET_ADDR);
struct get_addr_user_callback *const cb =
l_new(struct get_addr_user_callback, 1);
cb->get_addr = callback;
cb->data = data;
cb->complete = complete;
cb->dump = true;
return l_genl_family_dump(
pm->family,
msg,
get_addr_callback,
cb, /* user data */
get_addr_user_callback_free /* destroy */) == 0;
}
static int upstream_flush_addrs(struct mptcpd_pm *pm)
{
/*
Payload:
NONE
*/
struct l_genl_msg *const msg =
l_genl_msg_new(MPTCP_PM_CMD_FLUSH_ADDRS);
return l_genl_family_send(pm->family,
msg,
mptcpd_family_send_callback,
"flush_addrs", /* user data */