[cups-devel] [UNKN] STR #4491: CUPS mis-categorizes v1.::127.0.0.1 as not being localhost

[Didier Raboud]

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[STR New]

Hm. Attachement doesn't seem to work for some reason, pasting the patch
here:

- --- a/cups/http-addr.c
+++ b/cups/http-addr.c
@@ -202,8 +202,14 @@
     return (1);
 
 #ifdef AF_INET6
+  /* Match ::127.0.0.1 as localhost */
+  static const unsigned char mapped_ipv6_ipv4_localhost[] =
+        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x7f, 0, 0, 1 };
+
   if (addr->addr.sa_family == AF_INET6 &&
+     ( memcmp(&(addr->ipv6.sin6_addr), mapped_ipv6_ipv4_localhost, 16) ==
0 ||
       IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr)))
+     )
     return (1);
 #endif /* AF_INET6 */

Link: https://www.cups.org/str.php?L4491
Version: 1.7.5
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