Function parseSNI

internal/proxy/parser.go:797–820

parseSNI extracts the server name from SNI extension.

(data []byte)

// parseSNI extracts the server name from SNI extension.
func parseSNI(data []byte) string {
	if len(data) < 5 {
		return ""
	}

	// List length (2 bytes)
	offset := 2

	// Name type (1 byte, should be 0 for hostname)
	if data[offset] != 0 {
		return ""
	}
	offset++

	// Name length (2 bytes)
	nameLen := int(data[offset])<<8 | int(data[offset+1])
	offset += 2

	if offset+nameLen > len(data) {
		return ""
	}

	return string(data[offset : offset+nameLen])
}

// parseALPN extracts protocol names from ALPN extension.
func parseALPN(data []byte) []string {