Here's a patch series from the MPTCP tree that extends the capabilities of the MPTCP RM_ADDR header.
MPTCP peers can exchange information about their IP addresses that are available for additional MPTCP subflows. IP addresses are advertised with an ADD_ADDR header type, and those advertisements are revoked with the RM_ADDR header type. RFC 8684 allows the RM_ADDR header to include more than one address ID, so multiple advertisements can be revoked in a single header. Previous kernel versions have only used RM_ADDR with a single address ID, so multiple removals required multiple packets. Patches 1-4 plumb address id list structures around the MPTCP code, where before only a single address ID was passed. Patches 5-8 make use of the address lists at the path manager layer that tracks available addresses for both peers. Patches 9-11 update the selftests to cover the new use of RM_ADDR with multiple address IDs. Geliang Tang (11): mptcp: add rm_list in mptcp_out_options mptcp: add rm_list_tx in mptcp_pm_data mptcp: add rm_list in mptcp_options_received mptcp: add rm_list_rx in mptcp_pm_data mptcp: remove multi addresses in PM mptcp: remove multi subflows in PM mptcp: remove multi addresses and subflows in PM mptcp: remove a list of addrs when flushing selftests: mptcp: add invert argument for chk_rm_nr selftests: mptcp: set addr id for removing testcases selftests: mptcp: add testcases for removing addrs include/net/mptcp.h | 9 +- net/mptcp/options.c | 47 ++++-- net/mptcp/pm.c | 39 +++-- net/mptcp/pm_netlink.c | 139 +++++++++++++----- net/mptcp/protocol.h | 27 +++- .../testing/selftests/net/mptcp/mptcp_join.sh | 82 ++++++++--- 6 files changed, 250 insertions(+), 93 deletions(-) base-commit: 26d2e0426aacaf4c128dc57111f0d460ab20e8b5 -- 2.30.2
