clients/upsclient.c: comment about bracketed IP addresses/host names [n…

…etworkupstools#2512] Signed-off-by: Jim Klimov <[email protected]>
jimklimov · Jul 8, 2024 · 4007156 · 4007156
1 parent 0188c2f
commit 4007156
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/clients/upsclient.c b/clients/upsclient.c
@@ -1700,6 +1700,10 @@ int upscli_splitaddr(const char *buf, char **hostname, uint16_t *port)
 	}
 
 	if (*tmp == '[') {
+		/* NOTE: Brackets are required for colon-separated IPv6
+		 * addresses, to differentiate from a port number. For
+		 * example, `[1234:5678]:3493` would seem right.
+		 */
 		if (strchr(tmp, ']') == NULL) {
 			fprintf(stderr, "upscli_splitaddr: missing closing bracket in [domain literal]\n");
 			return -1;