SIP メッセージ解析

Why Parse SIP Packets?

The SIP Message Parser is a specialized client-side utility built for VoIP engineers, network administrators, and developers working with the Session Initiation Protocol (RFC 3261). When troubleshooting call drops, one-way audio, or registration failures, inspecting raw SIP traffic from a packet capture (PCAP) or debug log is crucial. This tool instantly transforms unreadable blocks of text into structured, searchable data.

Understanding the Parsed Components

When you paste a raw SIP request (like an INVITE) or response (like a 200 OK), the parser categorizes the information into three distinct layers:

• The Start Line: Identifies the message purpose. For requests, it contains the Method (e.g., REGISTER) and Request URI. For responses, it displays the SIP Version and Status Code (e.g., 401 Unauthorized).
• The Headers: Critical routing and transaction data. You'll see folded headers automatically unwrapped and properly formatted. The tool identifies essential fields like Call-ID, CSeq, Via, and Contact to help you trace the dialog path.
• The Payload (Body): Usually contains Session Description Protocol (SDP) details. This payload dictates the media negotiation (codecs, ports, IPs) required to establish the actual audio/video stream.

Strict Client-Side Processing

Because SIP traces often contain sensitive topology information (internal IP addresses, phone numbers, domain names, and authentication hashes), all parsing occurs locally in your browser. No SIP message or payload is ever transmitted over the network or saved to our servers, guaranteeing complete privacy for your diagnostic data.