From 21c0775c51da1ca3d4ef6506fca82bce5b334c79 Mon Sep 17 00:00:00 2001
From: Daniil Baturin <daniil@baturin.org>
Date: Tue, 13 Nov 2018 20:14:24 +0100
Subject: T816: disallow duplicate double semicolons.

---
 src/ipaddrcheck.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/ipaddrcheck.c')

diff --git a/src/ipaddrcheck.c b/src/ipaddrcheck.c
index 5e3243e..1bf889e 100644
--- a/src/ipaddrcheck.c
+++ b/src/ipaddrcheck.c
@@ -256,6 +256,14 @@ int main(int argc, char* argv[])
         }
         return(EXIT_FAILURE);
     }
+
+    /* FIXUP: libcidr allows more than one double semicolon, but the RFC does not! */
+    if( duplicate_double_semicolons(address_str) ) {
+        if( verbose ) {
+            printf("More than one \"::\" is not allowed in IPv6 addresses\n");
+        }
+        return(EXIT_FAILURE);
+    }
     /* no else needed, the rest is one big else */
 
     while( (action_count >= 0) && (result == RESULT_SUCCESS) )
-- 
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