ipv6_scope: support unique local addresses

Fixes #1764
Closes #1773
Reported-by: James Slaughter

diff --git a/lib/if2ip.c b/lib/if2ip.c
index 3e74cc68761464f3337005611f4e26ca192bf7fd..a91b6d2ab8555a53482b58d7b53e1a188c3ecacf 100644 (file)
--- a/lib/if2ip.c
+++ b/lib/if2ip.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -71,6 +71,8 @@ unsigned int Curl_ipv6_scope(const struct sockaddr *sa)
     const unsigned char *b = sa6->sin6_addr.s6_addr;
     unsigned short w = (unsigned short) ((b[0] << 8) | b[1]);
 
+    if((b[0] & 0xFE) == 0xFC) /* Handle ULAs */
+      return IPV6_SCOPE_UNIQUELOCAL;
     switch(w & 0xFFC0) {
     case 0xFE80:
       return IPV6_SCOPE_LINKLOCAL;

diff --git a/lib/if2ip.h b/lib/if2ip.h
index f3a7ff0b2fd6bc706626c995e98713c7691f9cb1..a90e662164db5d8c706790bdaf45abef3faabb0d 100644 (file)
--- a/lib/if2ip.h
+++ b/lib/if2ip.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -27,7 +27,8 @@
 #define IPV6_SCOPE_GLOBAL       0       /* Global scope. */
 #define IPV6_SCOPE_LINKLOCAL    1       /* Link-local scope. */
 #define IPV6_SCOPE_SITELOCAL    2       /* Site-local scope (deprecated). */
-#define IPV6_SCOPE_NODELOCAL    3       /* Loopback. */
+#define IPV6_SCOPE_UNIQUELOCAL  3       /* Unique local */
+#define IPV6_SCOPE_NODELOCAL    4       /* Loopback. */
 
 unsigned int Curl_ipv6_scope(const struct sockaddr *sa);