fix(server): /api/signin always returns 429 when request header x-forwarded-for contains client port

Fix #9408

packages/backend/src/misc/get-ip-hash.ts

@@ -1,9 +1,14 @@
 import IPCIDR from 'ip-cidr';
 
 export function getIpHash(ip: string) {
+	try {
 		// because a single person may control many IPv6 addresses,
 		// only a /64 subnet prefix of any IP will be taken into account.
 		// (this means for IPv4 the entire address is used)
 		const prefix = IPCIDR.createAddress(ip).mask(64);
 		return 'ip-' + BigInt('0b' + prefix).toString(36);
+	} catch (e) {
+		const prefix = IPCIDR.createAddress(ip.replace(/:[0-9]+$/, '')).mask(64);
+		return 'ip-' + BigInt('0b' + prefix).toString(36);
+	}
 }