[SR-Users] loose_route ACK and BYE

Daniel-Constantin Mierla miconda at gmail.com
Mon Feb 6 07:51:55 CET 2017


can you paste the output of ngrep for the ACK and BYE? Maybe one of it
has Route headers that get to $du and then have to be overwritten. $du
is used for routing if set, if not $ru.


On 03/02/2017 13:33, Ben Hood wrote:
> Hi,
> I've fixed a loose_route problem with a broken gateway.
> Essentially gateway sends ACKs and BYEs with an unroutable contact
> header (i.e. it sticks the address of the proxy into the header,
> rather than the destination UA address).
> This is all on the same network, so there is not NAT.
> So by caching the contact URI to for replies back to the gateway, I
> can populate $ru to forward the ACK or BYE back to the correct UA.
> However, what I've noticed is that for BYEs, I also need to set the
> $du variable in addition to $ru. But this is required for ACKs.
> This is not a problem per se, but I'm interesting to know why - could
> anybody explain?
> Cheers,
> Ben
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Daniel-Constantin Mierla
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