SIP 200 OK vs 438 Invalid Identity Header
SIP 200 (OK) is a 2xx Success response, while 438 (Invalid Identity Header) is a 4xx Client Failure response. 200 indicates that the request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully. In contrast, 438 means that the server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
Description
The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
Quand vous le voyez
When a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
Comment résoudre
No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions.
Description
The server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
Quand vous le voyez
When the cryptographic signature in the Identity header does not match the message content, indicating possible tampering.
Comment résoudre
Regenerate the Identity header with a correct signature. Ensure no intermediary is modifying signed headers after signing.
Différences clés
200 is a 2xx Success response, while 438 is a 4xx Client Failure response.
SIP 200: The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
SIP 438: The server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
You encounter 200 when when a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
You encounter 438 when when the cryptographic signature in the Identity header does not match the message content, indicating possible tampering.
Quand utiliser lequel
For 200 (OK): No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions. For 438 (Invalid Identity Header): Regenerate the Identity header with a correct signature. Ensure no intermediary is modifying signed headers after signing.