The ADD_ADDR MPTCP option is used to announce available IP addresses that a peer may connect to when adding more TCP subflows to an existing MPTCP connection. There is an optional port number field in that ADD_ADDR header, and this patch set adds capability for that port number to be sent and received.
Patches 1, 2, and 4 refactor existing ADD_ADDR code to simplify implementation of port number support. Patches 3 and 5 are the main functional changes, for sending and receiving the port number in the MPTCP ADD_ADDR option. Patch 6 sends the ADD_ADDR option with port number on a bare TCP ACK, since the extra length of the option may run in to cases where sufficient TCP option space is not available on a data packet. Patch 7 plumbs in port number support for the in-kernel MPTCP path manager. Patches 8-11 add some optional debug output and a little more cleanup refactoring. Geliang Tang (11): mptcp: unify ADD_ADDR and echo suboptions writing mptcp: unify ADD_ADDR and ADD_ADDR6 suboptions writing mptcp: add port support for ADD_ADDR suboption writing mptcp: use adding up size to get ADD_ADDR length mptcp: add the outgoing ADD_ADDR port support mptcp: send out dedicated packet for ADD_ADDR using port mptcp: add port parameter for mptcp_pm_announce_addr mptcp: print out port and ahmac when receiving ADD_ADDR mptcp: drop rm_addr_signal flag mptcp: rename add_addr_signal and mptcp_add_addr_status mptcp: use the variable sk instead of open-coding include/net/mptcp.h | 1 + net/mptcp/options.c | 103 ++++++++++++++++++++++++++--------------- net/mptcp/pm.c | 40 +++++++++++----- net/mptcp/pm_netlink.c | 31 +++++++++---- net/mptcp/protocol.h | 50 ++++++++++++-------- 5 files changed, 146 insertions(+), 79 deletions(-) -- 2.29.2
