[PROTON-2656] [proton-dotnet] Loopback IP Address lookup can fail on some systems

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: proton-dotnet-1.0.0-M6
• Fix Version/s: proton-dotnet-1.0.0-M7
• Component/s: proton-dotnet
• Assignee: Timothy A. Bish
• Reporter: Timothy A. Bish
• Created: 28/Nov/22 21:31
• Updated: 05/Dec/22 18:17
• Resolved: 05/Dec/22 18:17

Description

When resolving an IP Address from the string form the client uses a DNS entry lookup but for some addresses like local host (127.0.0.1) the DNS entry returned can contain the machine address first which matches the basic criteria and is hard to validate isn't what was intended based on the limited API.  We can first attempt a straight parse for raw IP Address vs a host name value and use the raw parsed value as truth instead of going to the DNS lookup API.