diff options
| author | Florian Westphal <fw@strlen.de> | 2021-11-21 23:33:16 +0100 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2021-12-01 14:11:39 +0100 |
| commit | 4a81a04294b3a0eaa033eb85c4660df037baee39 (patch) | |
| tree | 1ae319ba64d99d05a3f6d470cde8512c8d65f480 /src/tcpopt.c | |
| parent | d9985fe873c1c35dedd8fd73af4962ba94f3dc52 (diff) | |
mptcp: add subtype matching
MPTCP multiplexes the various mptcp signalling data using the
first 4 bits of the mptcp option.
This allows to match on the mptcp subtype via:
tcp option mptcp subtype 1
This misses delinearization support. mptcp subtype is the first tcp
option field that has a length of less than one byte.
Serialization processing will add a binop for this, but netlink
delinearization can't remove them, yet.
Also misses a new datatype/symbol table to allow to use mnemonics like
'mp_join' instead of raw numbers.
For this reason, no tests are added yet.
Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'src/tcpopt.c')
| -rw-r--r-- | src/tcpopt.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/tcpopt.c b/src/tcpopt.c index 5913cd06..641daa73 100644 --- a/src/tcpopt.c +++ b/src/tcpopt.c @@ -116,6 +116,7 @@ static const struct exthdr_desc tcpopt_mptcp = { .templates = { [TCPOPT_MPTCP_KIND] = PHT("kind", 0, 8), [TCPOPT_MPTCP_LENGTH] = PHT("length", 8, 8), + [TCPOPT_MPTCP_SUBTYPE] = PHT("subtype", 16, 4), }, }; #undef PHT |