SIP 199 Early Dialog Terminated vs 438 Invalid Identity Header
SIP 199 (Early Dialog Terminated) is a 1xx Provisional response, while 438 (Invalid Identity Header) is a 4xx Client Failure response. 199 indicates that a UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs. In contrast, 438 means that the server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
Deskripsi
A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
Ketika Anda Melihatnya
In forked call scenarios when one of the forked branches is cancelled because another branch was answered.
Cara Memperbaiki
No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully.
Deskripsi
The server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
Ketika Anda Melihatnya
When the cryptographic signature in the Identity header does not match the message content, indicating possible tampering.
Cara Memperbaiki
Regenerate the Identity header with a correct signature. Ensure no intermediary is modifying signed headers after signing.
Perbedaan Utama
199 is a 1xx Provisional response, while 438 is a 4xx Client Failure response.
SIP 199: A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
SIP 438: The server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
You encounter 199 when in forked call scenarios when one of the forked branches is cancelled because another branch was answered.
You encounter 438 when when the cryptographic signature in the Identity header does not match the message content, indicating possible tampering.
Kapan Menggunakan Yang Mana
For 199 (Early Dialog Terminated): No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully. For 438 (Invalid Identity Header): Regenerate the Identity header with a correct signature. Ensure no intermediary is modifying signed headers after signing.