kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

mptcp: add netlink event support

Browse source 
Allow userspace (mptcpd) to subscribe to mptcp genl multicast events.
This implementation reuses the same event API as the mptcp kernel fork
to ease integration of existing tools, e.g. mptcpd.

Supported events include:
1. start and close of an mptcp connection
2. start and close of subflows (joins)
3. announce and withdrawals of addresses
4. subflow priority (backup/non-backup) change.

Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2021-02-12 16:00:01 -08:00 • committed by David S. Miller
parent 4d54cc3211
commit b911c97c7d
5 changed files with 364 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

74
include/uapi/linux/mptcp.h
View file

@ -36,6 +36,7 @@ enum {
/* netlink interface */
#define MPTCP_PM_NAME "mptcp_pm"
#define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds"
#define MPTCP_PM_EV_GRP_NAME "mptcp_pm_events"
#define MPTCP_PM_VER 0x1
/*
@ -104,4 +105,77 @@ struct mptcp_info {
__u64 mptcpi_rcv_nxt;
};
/*
* MPTCP_EVENT_CREATED: token, family, saddr4 | saddr6, daddr4 | daddr6,
* sport, dport
* A new MPTCP connection has been created. It is the good time to allocate
* memory and send ADD_ADDR if needed. Depending on the traffic-patterns
* it can take a long time until the MPTCP_EVENT_ESTABLISHED is sent.
*
* MPTCP_EVENT_ESTABLISHED: token, family, saddr4 | saddr6, daddr4 | daddr6,
* sport, dport
* A MPTCP connection is established (can start new subflows).
*
* MPTCP_EVENT_CLOSED: token
* A MPTCP connection has stopped.
*
* MPTCP_EVENT_ANNOUNCED: token, rem_id, family, daddr4 | daddr6 [, dport]
* A new address has been announced by the peer.
*
* MPTCP_EVENT_REMOVED: token, rem_id
* An address has been lost by the peer.
*
* MPTCP_EVENT_SUB_ESTABLISHED: token, family, saddr4 | saddr6,
* daddr4 | daddr6, sport, dport, backup,
* if_idx [, error]
* A new subflow has been established. 'error' should not be set.
*
* MPTCP_EVENT_SUB_CLOSED: token, family, saddr4 | saddr6, daddr4 | daddr6,
* sport, dport, backup, if_idx [, error]
* A subflow has been closed. An error (copy of sk_err) could be set if an
* error has been detected for this subflow.
*
* MPTCP_EVENT_SUB_PRIORITY: token, family, saddr4 | saddr6, daddr4 | daddr6,
* sport, dport, backup, if_idx [, error]
* The priority of a subflow has changed. 'error' should not be set.
*/
enum mptcp_event_type {
MPTCP_EVENT_UNSPEC = 0,
MPTCP_EVENT_CREATED = 1,
MPTCP_EVENT_ESTABLISHED = 2,
MPTCP_EVENT_CLOSED = 3,
MPTCP_EVENT_ANNOUNCED = 6,
MPTCP_EVENT_REMOVED = 7,
MPTCP_EVENT_SUB_ESTABLISHED = 10,
MPTCP_EVENT_SUB_CLOSED = 11,
MPTCP_EVENT_SUB_PRIORITY = 13,
};
enum mptcp_event_attr {
MPTCP_ATTR_UNSPEC = 0,
MPTCP_ATTR_TOKEN, /* u32 */
MPTCP_ATTR_FAMILY, /* u16 */
MPTCP_ATTR_LOC_ID, /* u8 */
MPTCP_ATTR_REM_ID, /* u8 */
MPTCP_ATTR_SADDR4, /* be32 */
MPTCP_ATTR_SADDR6, /* struct in6_addr */
MPTCP_ATTR_DADDR4, /* be32 */
MPTCP_ATTR_DADDR6, /* struct in6_addr */
MPTCP_ATTR_SPORT, /* be16 */
MPTCP_ATTR_DPORT, /* be16 */
MPTCP_ATTR_BACKUP, /* u8 */
MPTCP_ATTR_ERROR, /* u8 */
MPTCP_ATTR_FLAGS, /* u16 */
MPTCP_ATTR_TIMEOUT, /* u32 */
MPTCP_ATTR_IF_IDX, /* s32 */
__MPTCP_ATTR_AFTER_LAST
};
#define MPTCP_ATTR_MAX (__MPTCP_ATTR_AFTER_LAST - 1)
#endif /* _UAPI_MPTCP_H */