SIP 300 Multiple Choices vs 438 Invalid Identity Header
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 438 (Invalid Identity Header) is a 4xx Client Failure response. 300 indicates that the address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint. In contrast, 438 means that the server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
描述
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
何时出现
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
如何修复
Select one of the provided Contact addresses and resend the request to that specific URI.
描述
The server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
何时出现
When the cryptographic signature in the Identity header does not match the message content, indicating possible tampering.
如何修复
Regenerate the Identity header with a correct signature. Ensure no intermediary is modifying signed headers after signing.
主要区别
300 is a 3xx Redirection response, while 438 is a 4xx Client Failure response.
SIP 300: The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
SIP 438: The server obtained the certificate from the Identity-Info header but the signature in the Identity header is invalid.
You encounter 300 when when a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
You encounter 438 when when the cryptographic signature in the Identity header does not match the message content, indicating possible tampering.
何时使用哪个
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. For 438 (Invalid Identity Header): Regenerate the Identity header with a correct signature. Ensure no intermediary is modifying signed headers after signing.