[Freeswitch-dev] mod_dingaling does not set crypto

[Anthony Minessale]

try patch in latest head minus your plc hack.
I have not made any changes to mod_dingaling yet but the core should
not try to decode stun now.


On Thu, Jul 12, 2012 at 11:58 AM, Richard Screene
<richard.screene at netdev.co.uk> wrote:
> Hello Anthony,
>
> Thanks for your quick response!
>
> does it work then? I had it disabled on purpose cos I have not
> confirmed it works yet.
>
> That would explain it then :-)
>
> I have managed to get SRTP working for the outbound voice path, but it
> required a couple of hacks:
> 1) It was attempting to decrypt the STUN/ICE Bind Requests and failing.
> I've bodged it for now by passing the SFF_PLC flag to
> switch_rtp.c:read_rtp_packet() but I suspect this will stop inbound voice
> paths from working!
> 2) In mod_dingaling.c:try_secure() the incorrect crypto_type is passed to
> switch_rtp_add_crypto_key().  I suspect there is some confusion between the
> crypto_type and crypto_send_type/crypto_recv_type members of
> tech_pvt->transports.  I've hacked it for now as shown below.
>
> I hope this is useful to you.  I'm going to try with the outbound voice path
> tomorrow.
>
> Regards,
>   Richard
>
>
> For reference here are the diffs:
>
>
>
> diff --git a/src/mod/endpoints/mod_dingaling/mod_dingaling.c
> b/src/mod/endpoints/mod_dingaling/
> index c47f589..1dda789 100644
> --- a/src/mod/endpoints/mod_dingaling/mod_dingaling.c
> +++ b/src/mod/endpoints/mod_dingaling/mod_dingaling.c
> @@ -956,9 +956,11 @@ switch_status_t mdl_build_crypto(struct private_object
> *tech_pvt, ldl_tran
>         char *p;
>
>
> +/*
>         if (!switch_test_flag(tech_pvt, TFLAG_SECURE)) {
>                 return SWITCH_STATUS_SUCCESS;
>         }
> +*/
>
>
>         if (type == AES_CM_128_HMAC_SHA1_80) {
> @@ -1056,10 +1058,13 @@ static switch_status_t mdl_add_crypto(struct
> private_object *tech_pvt,
>  static void try_secure(struct private_object *tech_pvt,
> ldl_transport_type_t ttype)
>  {
>
> +/*
>         if (!switch_test_flag(tech_pvt, TFLAG_SECURE)) {
>                 return;
>         }
>
> +*/
> +       tech_pvt->transports[ttype].crypto_type =
> tech_pvt->transports[ttype].crypto_recv_type;
>
>         //if (tech_pvt->transports[ttype].crypto_type) {
>
> switch_rtp_add_crypto_key(tech_pvt->transports[ttype].rtp_session,
>
>
>
>
> diff --git a/src/switch_rtp.c b/src/switch_rtp.c
> index 7d6ad29..99b4f83 100644
> --- a/src/switch_rtp.c
> +++ b/src/switch_rtp.c
> @@ -3234,6 +3234,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session,
> switch_payload_t *p
>                         if (read_pretriggered) {
>                                 read_pretriggered = 0;
>                         } else {
> +                               *flags |= SFF_PLC;
>                                 status = read_rtp_packet(rtp_session,
> &bytes, flags, SWITCH_TRU
>
> //switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH
>                         }
>
>
>
> On 12 Jul 2012, at 00:13, Anthony Minessale wrote:
>
> does it work then? I had it disabled on purpose cos I have not
> confirmed it works yet.
>
>
> On Wed, Jul 11, 2012 at 4:47 AM, Richard Screene
> <richard.screene at netdev.co.uk> wrote:
>
> Hello,
>
>
> Using mod_dingaling I am unable to get it to append the crypto details to
>
> the session-accept Jingle stanza.  The message is sent as:
>
> <snip>
>
>
>
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-- 
Anthony Minessale II

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