mptcp: add set_flags command in PM netlink

This patch added a new command MPTCP_PM_CMD_SET_FLAGS in PM netlink: In mptcp_nl_cmd_set_flags, parse the input address, get the backup value according to whether the address's FLAG_BACKUP flag is set from the user-space. Then check whether this address had been added in the local address list. If it had been, then call mptcp_nl_addr_backup to deal with this address. In mptcp_nl_addr_backup, traverse all the existing msk sockets to find the relevant sockets, and call mptcp_pm_nl_mp_prio_send_ack to send out a MP_PRIO ACK packet. Finally in mptcp_nl_cmd_set_flags, set or clear the address's FLAG_BACKUP flag.

Geliang Tang committed 5 years ago

Commit 0f9f6961 parent 40453a52 files · +66 −0Browse files

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include/uapi/linux/mptcp.h+1−0

@@ -82,6 +82,7 @@ enum { · 81 unmodified lines
82	82	MPTCP_PM_CMD_FLUSH_ADDRS,
83	83	MPTCP_PM_CMD_SET_LIMITS,
84	84	MPTCP_PM_CMD_GET_LIMITS,
	85	+ MPTCP_PM_CMD_SET_FLAGS,
85	86
86	87	__MPTCP_PM_CMD_AFTER_LAST
87	88	};