SIP 302 Moved Temporarily vs 400 Bad Request
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 400 (Bad Request) is a 4xx Client Failure response. 302 indicates that the callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests. In contrast, 400 means that the request could not be understood due to malformed syntax. The client should not repeat the request without modifications.
描述
The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
何时出现
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
如何修复
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
描述
The request could not be understood due to malformed syntax. The client should not repeat the request without modifications.
何时出现
When the SIP message has syntax errors, missing required headers, or invalid header values.
如何修复
Review the SIP message for syntax errors. Check required headers (To, From, Call-ID, CSeq, Via, Max-Forwards) and ensure proper formatting.
主要区别
302 is a 3xx Redirection response, while 400 is a 4xx Client Failure response.
SIP 302: The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
SIP 400: The request could not be understood due to malformed syntax. The client should not repeat the request without modifications.
You encounter 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
You encounter 400 when when the SIP message has syntax errors, missing required headers, or invalid header values.
何时使用哪个
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. For 400 (Bad Request): Review the SIP message for syntax errors. Check required headers (To, From, Call-ID, CSeq, Via, Max-Forwards) and ensure proper formatting.