net: allow wider regex in interface name

Zone IDs on Linux are network interface names. The regex we use to
determine valid IPs does not allow for non-alphanumeric characters
in the zone ID suffix. Some machines (including the RHEL Linux/s390x
machines from Marist) have zone IDs with a '.' character in them
which the regex in net.isIP rejects. This changes the regex.

Ref: #14500

Signed-off-by: Stewart Addison <sxa@uk.ibm.com>

PR-URL: #34364
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

lib/internal/net.js

@@ -25,7 +25,7 @@ const IPv6Reg = new RegExp('^(' +
   `(?:${v6Seg}:){2}(?:(:${v6Seg}){0,3}:${v4Str}|(:${v6Seg}){1,5}|:)|` +
   `(?:${v6Seg}:){1}(?:(:${v6Seg}){0,4}:${v4Str}|(:${v6Seg}){1,6}|:)|` +
   `(?::((?::${v6Seg}){0,5}:${v4Str}|(?::${v6Seg}){1,7}|:))` +
-')(%[0-9a-zA-Z]{1,})?$');
+')(%[0-9a-zA-Z-.:]{1,})?$');
 
 function isIPv4(s) {
   return IPv4Reg.test(s);

test/parallel/test-net-isip.js

@@ -46,6 +46,9 @@ assert.strictEqual(net.isIP('::2001:252:1:2008:6'), 6);
 assert.strictEqual(net.isIP('::2001:252:1:1.1.1.1'), 6);
 assert.strictEqual(net.isIP('::2001:252:1:255.255.255.255'), 6);
 assert.strictEqual(net.isIP('::2001:252:1:255.255.255.255.76'), 0);
+assert.strictEqual(net.isIP('fe80::2008%eth0'), 6);
+assert.strictEqual(net.isIP('fe80::2008%eth0.0'), 6);
+assert.strictEqual(net.isIP('fe80::2008%eth0@1'), 0);
 assert.strictEqual(net.isIP('::anything'), 0);
 assert.strictEqual(net.isIP('::1'), 6);
 assert.strictEqual(net.isIP('::'), 6);