[Rohan Sahay (rosahay-silabs)]

Summary

Update the Silicon Labs HttpClient to support hostname or IPv4-based server endpoints, eliminating the need to provide a separate server IP address and hostname.

• Replace serverIp and hostName with serverEndpoint and optional tlsHostname. When omitted, tlsHostname defaults to serverEndpoint for HTTP Host and TLS SNI.
• Introduce ResolveServerEndpoint() to resolve the server endpoint before each GET, POST, or PUT request:
  • Parse IPv4 literals using sl_net_inet_addr.
  • Resolve hostnames using sl_net_dns_resolve_hostname_v2 with a 5-second timeout and one retry.
• Connect using the resolved IPv4 address while preserving the configured TLS hostname for the NWP stack.
• Update the thermostat HTTPS offload example to use HTTP_SERVER_ENDPOINT and HTTP_TLS_HOSTNAME instead of HTTP_SERVER_IP and HTTP_HOSTNAME.

Related Issues

• N/A

Testing

• Verify HTTP GET, POST, and PUT requests using an IPv4 address.
• Verify HTTPS connections using hostname-based DNS resolution.
• Validate TLS hostname handling with both explicit and default tlsHostname configurations.
• Verify DNS resolution failure and retry behavior.

[Rohan Sahay (rosahay-silabs)]

bugbot review

[cursor]

PR Summary

Medium Risk
Changes TLS connect and SNI wiring plus adds blocking DNS on the HttpClient service thread; HttpHost is an API break for Silabs callers still passing separate IP and hostname.

Overview
Silabs HttpClient now accepts a hostname or IPv4 for the connect target instead of requiring a separate IP and SNI name. HttpHost replaces serverIp / hostName with serverEndpoint and optional tlsHostname (defaults to serverEndpoint for Host/SNI when omitted).

Before each GET/POST/PUT, ResolveServerEndpoint() parses IPv4 literals via sl_net_inet_addr or performs blocking IPv4 DNS (sl_net_dns_resolve_hostname_v2, 5s timeout, one retry), then connects using the resolved ASCII IP while still sending the TLS hostname to the NWP stack.

The thermostat HTTPS offload example is updated to use HTTP_SERVER_ENDPOINT and HTTP_TLS_HOSTNAME build macros instead of HTTP_SERVER_IP / HTTP_HOSTNAME.

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