SIP 204 No Notification vs 513 Message Too Large
SIP 204 (No Notification) is a 2xx Success response, while 513 (Message Too Large) is a 5xx Server Failure response. 204 indicates that the request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request. In contrast, 513 means that the server was unable to process the request since the entire SIP message (not just the body) exceeded the size limit.
描述
The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
何时出现
When subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
如何修复
No fix needed. The subscription was accepted but there is no state change to notify about yet.
描述
The server was unable to process the request since the entire SIP message (not just the body) exceeded the size limit.
何时出现
When the total SIP message (headers + body) is too large. Different from 413 which refers only to the body.
如何修复
Reduce the message size by removing unnecessary headers or reducing the SDP size. Consider using UDP-compatible message sizes (< 1300 bytes).
主要区别
204 is a 2xx Success response, while 513 is a 5xx Server Failure response.
SIP 204: The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
SIP 513: The server was unable to process the request since the entire SIP message (not just the body) exceeded the size limit.
You encounter 204 when when subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
You encounter 513 when when the total SIP message (headers + body) is too large. Different from 413 which refers only to the body.
何时使用哪个
For 204 (No Notification): No fix needed. The subscription was accepted but there is no state change to notify about yet. For 513 (Message Too Large): Reduce the message size by removing unnecessary headers or reducing the SDP size. Consider using UDP-compatible message sizes (< 1300 bytes).