From 0f782eb6377ddd1e5673c186b8b1a37edd610e4b Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Wed, 27 Apr 2016 11:44:37 +0200 Subject: ssl: Adapt DTLS to gen_statem DTLS is not in working mode yet, but the gen_statem rewrite should make completion easier. --- lib/ssl/src/dtls_record.erl | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) (limited to 'lib/ssl/src/dtls_record.erl') diff --git a/lib/ssl/src/dtls_record.erl b/lib/ssl/src/dtls_record.erl index 2530d66052..e79e1cede0 100644 --- a/lib/ssl/src/dtls_record.erl +++ b/lib/ssl/src/dtls_record.erl @@ -39,7 +39,7 @@ -export([encode_plain_text/4, encode_handshake/3, encode_change_cipher_spec/2]). %% Protocol version handling --export([protocol_version/1, lowest_protocol_version/2, +-export([protocol_version/1, lowest_protocol_version/2, lowest_protocol_version/1, highest_protocol_version/1, supported_protocol_versions/0, is_acceptable_version/2]). @@ -254,6 +254,18 @@ lowest_protocol_version(Version = {M,_}, {N, _}) when M > N -> Version; lowest_protocol_version(_,Version) -> Version. + +%%-------------------------------------------------------------------- +-spec lowest_protocol_version([dtls_version()]) -> dtls_version(). +%% +%% Description: Lowest protocol version present in a list +%%-------------------------------------------------------------------- +lowest_protocol_version([]) -> + lowest_protocol_version(); +lowest_protocol_version(Versions) -> + [Ver | Vers] = Versions, + lowest_list_protocol_version(Ver, Vers). + %%-------------------------------------------------------------------- -spec highest_protocol_version([dtls_version()]) -> dtls_version(). %% @@ -302,6 +314,12 @@ supported_protocol_versions([]) -> supported_protocol_versions([_|_] = Vsns) -> Vsns. +%% highest_protocol_version() -> +%% highest_protocol_version(supported_protocol_versions()). + +lowest_protocol_version() -> + lowest_protocol_version(supported_protocol_versions()). + supported_connection_protocol_versions([]) -> ?ALL_DATAGRAM_SUPPORTED_VERSIONS. @@ -421,3 +439,8 @@ mac_hash(Version, MacAlg, MacSecret, SeqNo, Type, Length, Fragment) -> calc_aad(Type, {MajVer, MinVer}, Epoch, SeqNo) -> NewSeq = (Epoch bsl 48) + SeqNo, <>. + +lowest_list_protocol_version(Ver, []) -> + Ver; +lowest_list_protocol_version(Ver1, [Ver2 | Rest]) -> + lowest_list_protocol_version(lowest_protocol_version(Ver1, Ver2), Rest). -- cgit v1.2.3