[SIPForum-discussion] What to do if sent-by value is missing in responses while proxy processing them ?

Tomasz Zieleniewski tzieleniewski at gmail.com
Sat Apr 18 09:48:55 UTC 2009


If the sent-by value is not present then it means that it doesn't match proxy
address. In such case as it it written message is discarded by proxy.

- Tomasz Zieleniewski

2009/4/17 Yevgen Krapiva <ykrapiva at gmail.com>:
> Hi all.
> This is quotation from RFC3261 about stateless response processing:
>>  Response processing as described in Section 16.7 does not apply to a
>>  proxy behaving statelessly.  When a response arrives at a stateless
>>  proxy, the proxy MUST inspect the sent-by value in the first
>>  (topmost) Via header field value.
>>  ...
>> If the address does not match the
>> proxy, the message MUST be silently discarded.
> What to do if sent-by value is not present in responses ? :)
> For example, I didn't find any in rfc3665 (sip call flow examples).
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