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Summary:ASTERISK-27288: res_fax:Fax gateway framehook not moved properly upon faxdetect masquerade
Reporter:Kinsey Moore (kmoore)Labels:
Date Opened:2017-09-22 08:47:25Date Closed:
Priority:MinorRegression?
Status:Open/NewComponents:Resources/res_fax Resources/res_fax_spandsp
Versions:13.16.0 Frequency of
Occurrence		Constant
Related
Issues:
Environment:Attachments:
Description:When faxdetect is enabled (chan_dahdi faxdetect option or FAXOPT(faxdetect) function) simultaneously with FAXOPT(gateway)=yes, the fax gateway framehook is not moved properly if faxdetect is triggered and the associated masquerade occurs.

Relevant log snippet:
{noformat}
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: dsp.c:624 tone_detect: 1100 Hz tone detected
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: sig_analog.c:1558 analog_handle_dtmf: End DTMF digit: 0x66 'f' on DAHDI/5-1
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: chan_dahdi.c:1723 my_handle_dtmf: End DTMF digit: 0x66 'f' on DAHDI/5-1
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: chan_dahdi.c:1748 my_handle_dtmf: Disabling FAX tone detection on DAHDI/5-1 after tone received
   -- Redirecting DAHDI/5-1 to fax extension
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: chan_dahdi.c:8941 dahdi_indicate: Requested indication 34 on channel DAHDI/5-1
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: channel.c:6792 channel_do_masquerade: Actually Masquerading DAHDI/5-1(1) into the structure of Surrogate/DAHDI/5-1(0)
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: res_fax.c:1284 fax_session_new: Requesting a new FAX session from 'Spandsp FAX Driver'.
[Sep 20 19:17:48] DEBUG[1913][C-00000000]: res_fax.c:1314 fax_session_new: channel 'DAHDI/5-1' using FAX session '1'
[Sep 20 19:17:48] ERROR[1913][C-00000000]: res_fax.c:3346 fax_gateway_framehook: no FAX session details found on chan Surrogate/DAHDI/5-1 for T.38 gateway session, odd
{noformat}

I know this is an oddball setup, but it is required for a badly behaving remote endpoint. This can be worked around by moving FAXOPT(gateway)=yes in to the fax extension so its framehook is only setup post-masquerade.
Comments: