mptcp: add port support for ADD_ADDR suboption writing

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In rfc8684, the length of ADD_ADDR suboption with IPv4 address and port
is 18 octets, but mptcp_write_options is 32-bit aligned, so we need to
pad it to 20 octets. All the other port related option lengths need to
be added up 2 octets similarly.

This patch added a new field 'port' in mptcp_out_options. When this
field is set with a port number, we need to add up 4 octets for the
ADD_ADDR suboption, and put the port number into the suboption.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Geliang Tang 2020-12-09 15:51:20 -08:00 • committed by David S. Miller

parent e1ef683222

commit 22fb85ffae

3 changed files with 33 additions and 8 deletions

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1

include/net/mptcp.h

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30

net/mptcp/options.c

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10

net/mptcp/protocol.h

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