fix: allow underscores in domain labels

src/client.tsmodified+2-2

Changes to src/client.ts

		⋯40 linesShow the 40 lines above this hunk@@ -41,7 +41,7 @@ export class DnsClient {
41	41	* - Start/end dots
42	42	* - Overall length (max 253 characters)
43	43	* - Label length (max 63 characters)
44		- * - Valid characters (a-z, 0-9, -)
	44	+ * - Valid characters (a-z, 0-9, -, _)
45	45	*
46	46	* @param domain - The domain name to validate
47	47	* @throws {Error} If the domain name is invalid
		⋯22 linesShow the 22 lines above this hunk@@ -70,7 +70,7 @@ export class DnsClient {
70	70	}
71	71
72	72	// Check label characters
73		- if (!/^[a-z0-9-]+$/i.test(label)) {
	73	+ if (!/^[a-z0-9_-]+$/i.test(label)) {
74	74	throw new Error(`Invalid characters in domain label: ${label}`)
75	75	}
76	76	}