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RTC_E_SIP_AUTH_TIME_SKEW
What RTC_E_SIP_AUTH_TIME_SKEW means in RTC
The operational meaning of this result is tied to selecting an allowed authentication method, validating the challenge realm, and establishing a protected SIP transport: SIP authentication validation failed because client and server time differ beyond the accepted window.
Log this result as 0x80EE006C in the RTC interface facility 0xEE, not only as a signed decimal; the facility distinguishes local RTC validation from a response status mapped by the stack.
The first useful check is to record UTC clocks, time source/synchronization state, challenge timestamp data, and timezone-independent values. The result must be separated from nearby conditions because time skew is not corrected by changing a password or repeating the same challenge.
Minimum incident record
- Code-specific proof: record UTC clocks, time source/synchronization state, challenge timestamp data, and timezone-independent values.
- Owning object: client/server UTC time and
TLSphase. - Wire evidence: 401 or 407 challenge source.
- Lifecycle state: authentication scheme and realm.
Protocol and object state
| RTC area | SIP authentication and TLS identity |
|---|---|
| Objects to correlate | profile authentication method, challenge headers, realm, credential source, TLS certificate and tunnel |
| Condition to prove | SIP authentication validation failed because client and server time differ beyond the accepted window |
| Safe corrective direction | restore trustworthy time synchronization and obtain a fresh challenge |
RTC profile rules tie some authentication methods to TCP or TLS; Basic authentication requires TLS in the legacy API contract. A certificate failure, a challenge mismatch, and invalid credentials occur at different layers and need different remediation.
Correct application response
Recovery should be narrow: restore trustworthy time synchronization and obtain a fresh challenge; while handling this result, do not let a higher layer simultaneously recreate the same session, registration, listener, or profile.
Example: A resumed laptop has a stale clock and cannot authenticate to the registrar.
How to prove the condition
- Start from
0x80EE006C, then find the method/event pair that first exposed it. - Keep the analysis at the right boundary: time skew is not corrected by changing a password or repeating the same challenge.
- After you restore trustworthy time synchronization and obtain a fresh challenge, repeat the smallest reproducer rather than restarting the entire application environment.
Nearby failure modes
RTC_E_SIP_AUTH_FAILED | the selected SIP authentication attempt was rejected or could not validate for the challenge |
|---|---|
RTC_E_SIP_AUTH_TYPE_NOT_SUPPORTED | the challenge requests an authentication scheme the RTC profile or stack cannot use |
RTC_E_SIP_AUTH_HEADER_SENT | the RTC authentication state already sent authorization for this challenge path and will not repeat it blindly |
Actions that do not address this condition
- Do not disable certificate checking or lower transport security to make authentication appear successful.
- Do not record Authorization header contents or plaintext passwords.
Technical references
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