MultimediaSystemControlMessage parse failed

[johnhypo]

I download H235-SECURITY-MESSAGES.asn, H323-MESSAGES.asn and MULTIMEDIA-SYSTEM-CONTROL.asn from wireshark source code.
I put H235-SECURITY-MESSAGES.asn and MULTIMEDIA-SYSTEM-CONTROL.asn into directory standard-modules.
And I compiled successfully with cmd:asn1c -pdu=all -fcompound-names H323-MESSAGES.asn.
However, the generated converter example failed to parse PDU with cmd:converter-example -aper -p MultimediaSystemControlMessage h245request.bin.
Problem 1
It can't parse MultiplexCapability.

MultiplexCapability ::= CHOICE {
  nonStandard                 NonStandardParameter,
  h222Capability              H222Capability,
  h223Capability              H223Capability,
  v76Capability               V76Capability,
  ...,
  h2250Capability             H2250Capability,
  genericMultiplexCapability  GenericCapability
}

It seems asn1c has problem when it parse extension. Converter successfully regconized h2250Capability if I detete "..."

MultiplexCapability ::= CHOICE {
  nonStandard                 NonStandardParameter,
  h222Capability              H222Capability,
  h223Capability              H223Capability,
  v76Capability               V76Capability,
  -- ...,
  h2250Capability             H2250Capability,
  genericMultiplexCapability  GenericCapability
}

Problem 2
Converter example failed to parse mediaDistributionCapability.

MultipointCapability ::= SEQUENCE {
  multicastCapability          BOOLEAN,
  multiUniCastConference       BOOLEAN,
  mediaDistributionCapability  SEQUENCE OF MediaDistributionCapability
  -- ...
}

MediaDistributionCapability ::= SEQUENCE {
  centralizedControl  BOOLEAN,
  distributedControl  BOOLEAN, -- for further study in

  -- ITU-T Rec. H.323
  centralizedAudio    BOOLEAN,
  distributedAudio    BOOLEAN,
  centralizedVideo    BOOLEAN,
  distributedVideo    BOOLEAN,
  centralizedData     SEQUENCE OF DataApplicationCapability OPTIONAL,
  distributedData     SEQUENCE OF DataApplicationCapability OPTIONAL,
  -- for further study in
  -- ITU-T Rec. H.323
  -- ...
}

Error info:
Decoding member "multiUniCastConference" in MultipointCapability (constr_SEQUENCE_aper.c:130)
[PER got 1<=1430 bits => span 107 +13[3..1432]:00 (1429) => 0x0] (asn_bit_data.c:139)
BOOLEAN decoded as FALSE (BOOLEAN_aper.c:39)
Decoding member "mediaDistributionCapability" in MultipointCapability (constr_SEQUENCE_aper.c:130)
Aligning 5 bits (aper_support.c:13)
[PER got 5<=1429 bits => span 112 +13[8..1432]:00 (1424) => 0x0] (asn_bit_data.c:139)
[PER got 8<=1424 bits => span 120 +14[8..1424]:fa (1416) => 0xfa] (asn_bit_data.c:139)
Got to decode -1 elements (eff -1) (constr_SET_OF_aper.c:152)
Failed decode mediaDistributionCapability in MultipointCapability (constr_SEQUENCE_aper.c:146)
Failed decode receiveMultipointCapability in H2250Capability (constr_SEQUENCE_aper.c:146)

How to solve this problem?
Help!!!

[velichkov]

Hi @johnhypo,

The aper support in the master branch is not very good. Try the vlm_master branch from mouse07410 fork that contains an alternative aper implementation.

[johnhypo]

这是来自QQ邮箱的假期自动回复邮件。   您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。